Can I want my cousins as my bridesmaids but not want their mother at my wedding?
Why? You got something against their mother?
I feel like they don't need her at the wedding.
It's your wedding, you're free to have whoever you want and don't want there. It may cause tension, but that'll pass.
Wait. I found out one of them is gay. I'm hoping to not have any gay people at the wedding.
You are allowed to invite whoever you want there even if it is because someone is gay. I wouldn't do it personally but we are all different.