@Georgy12
Your DP is doing as he should and trying to protect his daughter. This is an adult male who's unknown to him and will have responsibility for your daughter when she's vulnerable. Most abusers external to family are lovely and both kids and parents tend to love them, that's how they get close enough to abuse! I wouldn't personally, no matter how great he seems why take the chance?
Well we don’t actually know what the motivations of the Ops partner are.
He may be controlling and want to stop her having that time to herself two weeks out of three.
He may be jealous and angry because he doesn’t want her talking to another man.
The only reasons given by the OP was that the other man was a “ male parent “ and that made him uncomfortable.
Everyone here is just guessing why the Ops partner / child’s father is uncomfortable about his partner and child dealing with a “male parent”.
However as the child concerned is nearly 9 I’m assuming that she has met some other male parents / male non parents in the last 9 years. So I’m still unsure what the issue is.
Schools have male teachers, male janitors and other staff.
Men work as youth group leaders , sports coaches , pool attendants and sports centre receptionists. They are taxi drivers, bus drivers, shop assistants, doctors, nurses and dentists.
Many of the other children in her class will have male parents, grandparents , uncles and siblings.
I can’t see how this child has lived for 9 years and never encountered a man in any of these roles. What on Earth is going to happen when she goes to high school and there are men all over the place as staff and fellow pupils ?