Aitah for telling my friend the real reason I rejected her?

A Reddit user (33M) is a single dad who has been raising his 6-year-old daughter alone after her mother’s passing. While he often helps his sister, Claire (35F), by babysitting her three kids, he recently refused when she requested a last-minute weekend of childcare, as he had already planned a special daddy-daughter weekend.

Claire responded by saying he should be willing to help because she has “real responsibilities” with three kids, while he “only” has one child. Hurt by her dismissive comments, he told her he wouldn’t babysit if she doesn’t respect his parenting role. Now, Claire is upset, and even their mom is urging him to apologize. Is he in the wrong? Read the original story below for more details:

‘Aitah for telling my friend the real reason I rejected her?’

Take a look at the comments from fellow users:

Do you think the user was justified in refusing to babysit after his sister’s hurtful comment, or should he have let it go to support his sister? How would you handle a family member who disregards the challenges of single parenting? Share your thoughts below!