Bit of background, I've been in DSD's life since she was one.
My partner and I introduced me as his partner after six months, but built up slowly. For example, I would stay at family's house overnight when she first began to stay over at our house at three years old. We saw each other every day, often with DSD's mum also. All very gentle and mindful of DSD's needs, ensuring mum was comfortable too, as she struggled to accept that her ex had moved on and that another woman was becoming involved in DSD's life.
When DSD was four, mum starts seeing someone new. We were happy for her as she hadn't really been interested in anyone but my DP since the breakup.
However, suddenly all safeguarding seemed to disappear. She had him stay over the first night they met, with DSD in the house. Suddenly, he and his two kids were always there. She moved him in and then his youngest (about one y.o.) stopped coming. Turns out, her mum had gone NC and refused him seeing this child. He still sees his eldest, looks about 9 y.o.
We communicated our concerns of him suddenly being there overnight and bringing his kids, this was not how we had done introductions and DSD was clearly confused about who this guy was and why he was staying in her house. I might add, they were in a flat, DSD had been cosleeping with her mum. He was apparently sleeping on the sofa, but DSD had let slip that this was not the case.
Fast forward two years and he's still in the picture. They've managed to get a bigger house and no longer all sharing one room. They've had child together but he still displays worrying behaviour. He's clearly not seeing his other child, not sure what's going on there, I don't know if this is a red flag.
The issue is, DSD says he doesn't mind if she's naked in front of him. Calls him "baby" and I am so terrified that he is up to something. I don't trust him, I tell her she shouldn't be naked around people that aren't family, but she says he is family. He is the father of her sibling.
Am I making a mountain out of a molehill? Would you be worried? I try not to pry and ask her questions, these are just things that she's said. But I just don't want her to be hurt by this man. He has been in her life for about two years at this point.