AITA for telling my sister that I’m not her kids nanny and to take care of them herself?

A 17-year-old high school senior ends up living with her half-sister after dad takes a dream job overseas. Mom passed years ago, and leaving senior year feels impossible—so she stays half an hour away in a packed two-bedroom house with three kids under six. Dad pays, but the deal quickly turns sour.

The teen shares a tiny room with her sister and the baby, handles daycare pickups, and watches the kids daily without pay. One chaotic afternoon of crying, hunger, and diaper demands pushes her to snap: “I’m not your nanny.” Threats fly, lines are drawn, and the internet explodes with opinions.

The whole mess kicks off with the teen settling into her sister’s place to finish senior year without uprooting her life.

Space issues pile on quick, turning the arrangement into a squeeze nobody signed up for comfortably.

What starts as staying over morphs into full-time kid wrangling, even though sister’s working from home.

The teen tries speaking up before, but it only leads to talks of “contributing” without real choices.

One afternoon, kid demands interrupt everything, pushing the teen to her limit right then and there.

Frustration explodes into a clear stand that draws a hard line in the sand.

This teen’s stuck in a classic squeeze between needing a roof and dodging unpaid labor that feels endless. She’s grieving her mom, adjusting to dad’s absence, and now sharing a bedroom with a toddler—talk about overload. Sister’s side makes sense too; three kids under six in a tiny space means any help lightens the load, especially with work-from-home demands pulling her focus.

Beyond that, the dad’s payment adds a wrinkle. If it’s just covering basics like food and utilities, sister’s still sacrificing privacy and peace. But expecting a high schooler to handle pickups, diapers, and entertainment daily without prior agreement crosses into unfair territory. Truly, both are stretched thin, highlighting how family favors can turn sour without clear talks upfront.

Relationship expert Dr. Laura Markham from Aha! Parenting notes, “When teens live with relatives, explicit agreements about chores and childcare prevent resentment. Everyone needs to feel respected, not taken for granted.”

Practical fixes start with a family meeting—maybe dad joins via video. List out fair contributions: teen handles her own laundry and one evening meal prep weekly, while sister manages daycare runs since she’s home. Compromise on babysitting to one hour post-pickup if needed, or teen pitches in on weekends for extra cash from dad. Set a trial week, then tweak. This builds teamwork instead of threats, easing tension before college hits.

Here’s how people reacted to the post:

Plenty of folks rallied behind the teen, stressing she’s not obligated to be a full-time helper.

A few users pushed for nuance, seeing burdens on both sides without full blame.

Others kept it light, injecting humor to cut the drama.

In the end, this sibling standoff boils down to mismatched expectations in a high-pressure living setup, with the teen craving independence and the sister needing backup amid kid chaos. Dad’s money helps but doesn’t erase the daily grind for anyone involved. Everyone’s got valid gripes, from lost privacy to unwanted duties. What would you do if family turned your stay into a job—help out quietly or draw that line loud and clear?