AITA for wanting my adult step-daughter (18) to move out?

Blended families aren’t always easy, and while I’ve tried to create a stable home for everyone, new changes are bringing old tensions to the surface. For years, my stepdaughter has lived with us, and while I care about her, the reality is that our house is small, and with another baby on the way, space is running out. What feels to me like a practical solution — turning her room into a nursery — has exploded into accusations, ultimatums, and fears that I could lose more than just a bedroom.

Sharing My Home Since 2016

A Bond That Makes Me Jealous

The Baby on the Way and the Space Problem

“She’s 18, She Can Move Out”

Husband’s Ultimatum: “If She Goes, I Go”

Fearing I’ll Lose My Family Either Way

Curious to hear the verdict from Reddit on this one.

Now I’m left torn between what feels logical and what feels cruel. On paper, Erin is an adult, but in reality, she’s still a student with nowhere else to go, and my husband is furious at even the suggestion of her leaving. I never wanted to be the villain in this family, but it seems like no matter what I choose, someone is going to feel betrayed. So, am I wrong for putting my needs — and my new baby’s needs — ahead of my stepdaughter’s place in our home?