AITA for declining to share my daughters inheritance with my stepdaughter?

My wife and I married when our kids were 5 & 3. We are currently in our 50s. I have 2 boys and wives has 2 girls. My boys are single in their 20s and wives eldest is married with 2 kids and lives with us.<br><br>Her daughter has been the most difficult member of our blended family. She was mean to the boys, would throw tantrums to get her way, and would constantly try to drive a wedge between us and her mother. We were not surprised when she moved out at 18 but we were upset by her decision to not allow us to attend her wedding.<br><br>She currently has 2 kids (now aged 4 & 1) and lives in the house we purchased for her. She recently asked me if she could borrow money to pay off some credit card bills. Wifes and I discussed the ask and decided to turn her down. She then demanded to know why she couldn't have access to her inheritance. My answer was 1) she was still alive and 2) her inheritance was my money to do with as I pleased until I died. My reason for saying that was that I wanted to make it clear that I had no plans of leaving her money while I was still alive and no reason to ever change that.<br><br>My wife is now angry with me for being so callous and stated that she would always get an inheritance. I told her that my money, my decision and she could leave me if she didn't like it. She left me to stay with her parents.