My 40th birthday trip was meant to bring our blended family closer together.

Instead, my husband told my 16-year-old daughter she would have to spend the whole vacation babysitting her 5-year-old stepbrother. When she said no, he canceled her plane ticket — and gave her seat to his mother.

After we landed, my daughter called me in tears. She had packed up and moved in with her biological father in another state. “It feels like I’m not one of your priorities anymore,” she told me.

I got on the next flight to see her that night, but she doesn’t want to come home.

I love my husband, and I thought we had a happy marriage. Now I’m questioning everything — how do I earn my daughter’s trust back, and why did I let her stepfather push her out of our own family vacation?