I (19F) live at home while going to college full-time. I help around the house, pay for my own stuff, and try not to be a burden to my parents. My older sister (24F) just had a baby and moved back in with us temporarily.

Ever since she came back, my life has completely changed. I get woken up at night by the baby crying, and my sister constantly asks me to watch the baby while she “takes a break” or “runs errands.” It started off small, but now it’s like I’m the built-in babysitter just because I’m home and not working a 9–5.

I tried telling her (gently) that I have my own responsibilities—classes, studying, and some freelance work—but she got really upset and said I’m being selfish and “not supporting the family.” Even my mom hinted that I should be helping more since “we’re all in this together.”

I feel so guilty because I love my niece, but I didn’t sign up to be a second mom. I’m still just figuring out my own life. AITAH for setting a boundary?