August 20, 2026 at 7:35 pm

He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

by Matthew Gilligan

man and woman having serious conversation

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The sibling rivalry is red hot in this story!

And, let’s face it, every family has its up, downs, and every spot in between.

And things can get even more dicey when money comes into the picture…

Check out what this guy had to say about why he and his sister are not exactly on the best of terms right now.

AITA For Not Sharing My Inheritance With My Sister Since She Chose To Be Adopted?

“I (30m) lost my mom when I was 5.

Despite being so young I had very vivid and treasured memories of my mom and did not take to my dad dating a year after her passing well.

My dad recognized that he knew this would be hard for me but said that as the parent/adult he knew what was best even if it didn’t seem that way at first and that he’d thank me in the long run.

Not long after that, he married my stepmom “Lucy” and when I began to act out over it my dad said that parenting alone was hard and that my sister “Jessica” (28f) needed a mom.

My dad even got my maternal grandparents to tell me that everything would be fine and how I needed to be a “good boy.”

He was having a really hard time with this.

That was enough to get me to behave during the wedding but once Lucy moved in and started redecorating I started acting out again.

My dad had had enough and just started punishing me whenever I acted out or made Lucy upset as well as used the “Jessica isn’t acting out like this” and to be honest Jessica was easily pleased and wasn’t alive long enough to have the same attachment to our mom as I did.

This wasn’t going well…

It really upset me when Jessica started calling Lucy “Mom” and it really ticked me off when Lucy started referring to me as her son. I always corrected it when she tried that around me.

It got worse when I was 8 and Lucy had her own kids because then my dad and her started pushing for adoption. Jessica, obviously, had no problems with it but I refused.

My dad had my maternal grandparents come in again and tell me that adoption wouldn’t be that bad, but I still refused. Lucy and my dad pushed for the adoption anyway but thankfully the judge listened to my feelings in a private room and denied it.

After that, therapy started but it didn’t last so they also tried the “since you don’t want to be a part of THIS family you don’t get X or you can’t come do Y” but I was too stubborn for that method to work on me.

It was time for him to leave.

The only one who I felt was on my side was my paternal aunt who kept sticking up for me whenever she’d see what Lucy and my dad were trying to do, so when I turned 18, I went straight to her.

It was when I became a legal adult that my maternal grandparents confessed that they were never okay with the situation but my dad threatened to keep me and my sister away if they didn’t show support.

I was furious, so furious that I had my surname legally changed to my mom’s maiden name as I wanted nothing to do with my dad and only ever really talked to my paternal aunt.

Wow!

Fast forward to now and my grandma has passed away (grandpa passed in 2020) and according to their will, only their legal grandchildren is to split a $250,000 inheritance and since Jessica is legally Lucy’s daughter all she got was a framed photo of my mom and a letter.

Jessica doesn’t think it’s fair and thinks I should share but I told her to get money from her legal grandparents.

My aunt thinks I’m being a bit harsh.

AITA?”

Readers shared their thoughts.

This person said he’s NTA.

Screenshot 2026 08 15 at 12.16.56 PM He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

Another reader agreed.

Screenshot 2026 08 15 at 12.17.06 PM He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

This individual spoke up.

Screenshot 2026 08 15 at 12.17.13 PM He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

Another Reddit user weighed in.

Screenshot 2026 08 15 at 12.17.47 PM He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

If you enjoyed this story, check out this post about a woman who finally blew up after years of being treated as the second-best sibling.

And this reader shared their thoughts.

Screenshot 2026 08 15 at 12.18.01 PM He Refused to Share His Mother’s Inheritance with His Sister—Because She Let Their Stepmother Adopt Her

There’s a lot going on with these folks!

It sounds like maybe this guy should at least give a thought to reconsidering what’s going on here…

Time will tell!

The drama is strong in this family!

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