It doesn’t matter in my opinion if you change your mind or not. You are allowed to change your mind momma! I’ve had to set many boundaries and change my mind many times
I never had anyone else come to ultrasounds but my husband (with baby #2 my son has come along too but...he's 2 years old lol). I think it's totally fine for you to change your mind and want that moment with just your boyfriend!
Thankfully it was only a suggestion I told him and not her this time 😮💨