Am I wrong for refusing to live with my step-moms sister and niece for 1 month during our vacation?

Anonymous

My dad has been married to my step mom for almost 20 years. I had very bad relationship with her when I was growing up. She didn’t like that me and my full siblings visited our dad during the weekends. When I was 12 she even cussed my mom infront of me. She’s also complained about me many times to my dad.

Fast forward I’m grown woman who’s independent and in my late 20’s. I've cut contact with my step mom. I haven’t talked to her for the last 7 years.

This summer I’m planning to travel to our homecountry with my dad and brother (my full brother) My dad said that while we are there my step-moms sister and niece would live with us and help us around the house. Mind you this my dads own house and I told him we could always hire a housekeeper. I said that I don’t want my stepmoms relatives there living there with us while I’m there. He said that he doesn’t want random person there due to security reasons.

Am I wrong for refusing to live with my step-moms sister and niece for 1 month during our vacation?
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