AITA for going to the gym first thing in the morning without checking in my SIL first?

What happens when temporary family living arrangements turn into unspoken childcare demands? Many young adults helping relatives expect gratitude, not entitlement over their personal routines.

This 23-year-old woman stuck to her early weekend gym habit while her brother and sister-in-law stayed at the family home. Returning to frantic messages and an angry outburst for not being available to babysit unannounced left her guilt-ridden, questioning if prioritizing self-care made her inconsiderate.

‘AITA for going to the gym first thing in the morning without checking in my SIL first?’

The temporary living situation began smoothly with occasional babysitting.

My brother and SIL moved into my parents house where I (f23) live a few weeks ago with their 2 year old while their house is being renovated.

I watch my nephew sometimes but I don’t know much about kids or taking care of them. I usually go to the gym very early on weekend mornings when it...

One morning routine led to unexpected demands and conflict.

Yesterday morning I got up and went to the gym as usual no one was up yet. At the gym I leave my phone in the locker so I don’t...

When I got my phone out of the locker I had a bunch of calls and texts from SIL demanding to know where I was saying she needed me to...

When I came home she blew up on me for not checking they needed me before going to the gym they had errands to run and she missed her nail...

The clash stems from uncommunicated expectations in shared living. The young woman maintains healthy routines, viewing babysitting as occasional favors. The sister-in-law assumes on-demand availability, treating her as default caregiver without planning.

Both feel justified initially. She prioritizes autonomy in her own home. The sister-in-law seeks convenience during transition, possibly overlooking courtesy. Lack of advance notice escalates frustration.

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Family dynamics expert Dr. Joshua Coleman observes that “Temporary cohabitation thrives on explicit agreements to prevent resentment” (from work on adult siblings). Assumptions breed entitlement.

Establish schedules for favors in writing. Require advance requests for childcare. Redirect to paid options if needed. Protect personal time unapologetically while offering reasonable support.

Here’s how people reacted to the post:

Social media users unanimously backed the gym-goer in this childcare expectation dispute. They criticized the sister-in-law’s entitlement and urged strong boundaries.

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Every commenter ruled her not the asshole, stressing no obligation for unannounced babysitting.

Savings_Bird_4736 − NTA. Don't let her turn you into her in-home childcare! If you start making small concessions like this it will blow up in your face.

Icy_Session3326 − Obviously NTA and to be honest I’d be sitting down with them both and reminding them that as much as you don’t mind helping out here and there,...

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The SIL sounds incredibly entitled and if you don’t nip that behaviour in the bud with her now and set that boundary I Expect it will just continue/ get worse

mdthomas − So they moved in with you and expect you to be at their beck and call to watch their child? What did they do when they had to...

ISOCoffeeAndWine − Most adults arrange childcare in advance of needing. She doesn’t like that you can go out, live your life & do what you want, when you want. You...

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Several emphasized practical steps and the sister’s overreach.

altaawesome − Nta she could have asked your parents or she could've gone by herself to her nail appointment and left your brother watching his son

Edit: I'm also assuming since it was an appointment she knew in advanced meaning she should've asked when she made the appointment or at the very least the day before.

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Gadgetownsme − NTA You're not obligated to be their childcare and you didn't agree to it ahead of time. Besides, your brother is fully capable of watching his own child...

I think they just didn't want to have the kid with them. I have kids, I get it, it's nice to have time away, but you don't get to use...

[Reddit User] − NTA-she is now assuming you are on call 24/7 for her needs. Set boundaries with her that you are not free childcare, nor the paretns.

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jules79 − NTA. Your are not their live in nanny. They moved into where YOU live. You are not beholden to them. I'd sit SIL and bro down and make...

CaroSCP − Do they pay you for looking after him? If not, you're not the nanny, you have your own life, they need to get over themselves and stop taking...

thewhiterosequeen − Obviously you are NTA. It's not your kid or your responsibility to make their life choices easier at your expense. They can do errands with a kid like...

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This morning routine clash underscores how temporary favors can morph into taken-for-granted duties without clear communication. Personal time remains sacred, even in shared homes—helping family doesn’t mean surrendering autonomy.

Would you adjust your schedule for unannounced family needs during a short stay? How can young adults set childcare boundaries without guilt when living with relatives?

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