AITA for making my fish tank off limits to my boyfriends son?

Have you ever felt your personal space violated by someone close to you? A 24-year-old woman shared a story about her cherished betta fish tank, which she meticulously cares for as a source of peace. Tensions arose when her boyfriend’s 13-year-old son repeatedly dumped food into the tank despite clear instructions not to.

Her decision to move the tank to her bedroom sparked a conflict with her boyfriend, who argued she was making his son feel bad. Was she too harsh, or was this a justified move to protect her sanctuary? This story uncovers a common family struggle, where personal boundaries clash with parenting responsibilities.

‘AITA for making my fish tank off limits to my boyfriends son?’

A young woman’s passion for her fish tank sets the stage.

I am 24F, my boyfriend is 30M, his son is 13M (he had him when he was very young), and my brother is 12M. I have a 5 gallon tank...

For those who know fish and aquariums, my tank includes a sponge filter and a heater for my buddy, as well as live plants and decor. There is a glass...

I never had a fish before, so I had done a ton of research on properly caring for him and the tank. I chose a fish because I was going...

Things took a turn when her boyfriend’s son broke the rules.

About a month ago, my boyfriends son and my brother were at my house while we were at work. I told them to not worry about feeding the fish or...

I feed my fish twice a day and give him a couple of pellets over 1-2 minutes to make sure I am not over feeding him. When I come home...

It was everywhere: all over the gravel, plants, decor, and spread across the top. It looked like a hundred pellets were in there. I was livid, and told my boyfriend...

His son tried to blame my brother, but I have cameras in the house and went through them to prove to my boyfriend that it was his son. My brother...

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Despite warnings, the incident repeated, pushing her to act.

Last week, it happened again. The son told my boyfriend that he did it because the fish “looked hungry.” The fish tank was filled with food all over the place....

My boyfriend tried to talk to me and I told him that I am moving the tank from the living room to the bedroom during the time his son is...

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My boyfriend told me I was being an a__hole and I am going to make his son feel bad when he sees that the fish tank is not in the...

She clarified her relationship with the boy and her reasoning.

I have no problems with his son. We aren’t very close, but I am always nice to him and often take him and my brother out for play dates while...

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After feedback, she took a firm stand on her boundaries.

Edit/Update: Thank you to everyone who responded and for the advice/feedback. I was not expecting this big of a response and I feel a lot better after reading through the...

I am going to tell my boyfriend that he either respects me, my boundaries, my house, and my stuff, or he will have to find somewhere else to live. As...

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I have built a life for myself in my house and I will not allow someone else (him&son) to bring me down by their disrespect. If he cannot control his...

No, I do not want to be living like this for the rest of my life. I do not want to be used or taken advantage of in any way,...

I know that I do not need a grown man and his child to bring me down because they cannot respect my household..

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Some info: This is my house. My boyfriend moved in with me last year because the place I worked at closed and my income was cut in half. I am...

It really helps having someone pay half of the expenses. Yes I have cameras, I got them while I was living alone and would have probably gotten them anyways due...

His son was not always like this. His deviant behavior began more recently. My boyfriend and I have been together for 3 years, so I blamed his newfound behavior on...

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I wanted to move the fish tank and not simply hide the food because I am not sure what else he would try to do or put in there. I...

I have tried to show him how to properly feed the fish. He didn’t care. I didn’t really expect him too. But that means he cannot feed him. He knew...

I cannot do it a third time, and quite frankly, I won’t.. I will probably stop responding now as I have answered most questions in the comments.. Thank you again...

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This conflict centers on setting boundaries in a blended family. The 13-year-old’s actions show disrespect, not just mischief. The father’s response, prioritizing his son’s feelings, complicates the situation further.

This reflects a common challenge in blended families. As a psychologist notes, “Clear boundaries are essential for mutual respect in family relationships.” — John Gottman (PhD, Psychologist), The Gottman Institute, 2019 . When boundaries are repeatedly crossed, trust erodes. The woman’s decision to move the tank protects her property and emotions.

Conversely, the boyfriend’s concern about his son’s feelings raises questions about parenting roles. Protecting a child’s emotions matters, but not at the expense of accountability. Similar situations occur in many households, where parents hesitate to discipline, leading to repeated misbehavior.

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The long-term impact of unclear boundaries affects both relationships and a child’s growth. A child who doesn’t respect rules may struggle socially later. The twist here is that this isn’t just about a fish—it’s about respect in her home. This situation prompts reflection on balancing family harmony with personal boundaries.

Here’s the feedback from the Reddit community:

The online community largely supported the woman, though some offered nuanced takes on handling the situation.

Many backed her, stressing that her boundaries were reasonable.

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FloMoJoeBlow − ”I am going to make his son feel bad” Well, yeah. Son should feel bad. Clearly this BF does not respect OP, and doesn’t know how to tell...

butterfly-garden − "I am going to make his son feel bad." Oh well.

NewGoatFish − NTA. Actions have consequences. First consequence was a talking to. It happened again, now the consequence is not being able to enjoy the fish when he’s over. These...

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Sounds like your boyfriend would prefer if you (and your fish) are the only ones who have to deal with the consequences of his son’s actions. Probably part of the...

BigBlueHood − NTA. Overfeeding can k__l the fish, your bf should be explaining it to his son, not enabling him.

Sea_Firefighter_4598 − NTA. It is appropriate that his son feels bad in this situation. The fish shouldn't have to die from over feeding because daddy is afraid to talk to...

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SmokeLast6278 − NTA. Some people don't understand (or don't want to understand) that a fish is still a pet. Overfeeding can k__l a fish. Changes to water conditions can k__l...

I would be livid if anyone messed with them. Your boyfriend either needs to discipline his son or just accept that the fish tank will be out of reach of...

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[Reddit User] − "I am going to make his son feel bad. " Yeah. ..that's the point of a punishment. You can't follow the rules, something bad happens to you...

[Reddit User] − NTA Your boyfriend is for using the but he’ll be sad excuse. His son was told how many times to not touch the fish tank that the...

and he ignored that and practically dumped food into the tank and left a mess over the floor. Honestly you need to reevaluate this relationship with your boyfriend.

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Some suggested educational approaches while criticizing the boyfriend.

Zora74 − NTA. The son is a liar and a lot listener. You are allowed to set boundaries in your own home, especially in the care of your pets. You...

Some kids will do better with authority if the rules are explained to them and not just “because I said so. ” This could be a teaching moment for both...

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StreetTailor7596 − Your boyfriend is being a d__k - prioritizing his son's feelings over yours when it comes to your property - your pet. This is a big flag to...

This is completely different. Is he going to demand you be okay with his son throwing tantrums next? What about saying "no" to his son when he’s trashing other things...

Others raised concerns about the boy’s behavior as a red flag.

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YuunofYork − Sorry but that's one dumb 13 year old. Does he have developmental problems? Which wouldn’t really matter, if you left that out, since it’s still your property, but...

Reasonable_Pass_7488 − Just because your boyfriend had a kid at 16/17 doesnt absolve him from being a dad. And dads say NO. Dads also teach their children boundaries. Dads teach...

You may be 11 years older than the son & the way this is going, boyfriend is teaching son he doesn’t have to listen or respect you. Honestly, talk to...

Im betting he tolerates him to be with you. As in your brother does not like him!9 It may need to become a thing where your boyfriend is the only...

DragonflyInfamous898 − He did that s__t on purpose. He’s going to retaliate. And clearly bf is one of those parents that enables him. Uh-uh honey

Mental-Freedom3929 − This son is doing this to deliberately p__s you off. Your boyfriend seems to miss the bare basics of being a boyfriend and is creeping pretty close to...

It is the attitude of the teenager and his father that allows this to happen and is a disrespect that will not be an isolated issue over the tank. You...

GonnaBeOverIt − NTA but that kid is old enough to have consequences for his actions. Ask yourself if you want to be in a relationship for the next however many...

The community strongly supported the woman, emphasizing her right to protect her property. Some suggested a gentler approach with the boy, while others warned that his behavior signals deeper issues in the relationship.

This story highlights the importance of boundaries in family dynamics. Small acts of disrespect can escalate if left unaddressed. The woman’s choice to protect her sanctuary raises questions about parental responsibility. What would you do if a family member repeatedly crossed your boundaries? How do you balance maintaining harmony with protecting your personal space?

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