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The original was posted on /r/AmItheAsshole by /u/TaxNo6841 on 2023-08-07 19:46:38.

My husband has a son (7) from a previous relationship. My husband temporarily has full custody of his son, because his mother is in deep financial trouble. He has been with us for 8 months, my family knows him, my cousins. No one had any problems with him attending family functions.

My cousin (26f) is getting married in October.

She sent us an invitation, but it was only my husband and I on the invitation. I asked my cousin about it and asked if it was a mistake. She clarified that it was not a mistake and that he wasn’t invited, because it was a family-only event.

My husband was understandably very upset and will not be attending the wedding. I want to attend my cousin’s wedding just as a formality and won’t stay the entire wedding day. I haven’t told my husband this yet. My sister is also not attending the wedding her stepdaughter was not invited. My cousin and I are very close and I want to at least show up so she’ll know I’m there for her, but I’m not sure if I’ll be the asshole if I attend. AITA?