So my boyfriend is still in contact with his ex he was with for 5 years because he still sees her kids as his own (they are not his kids) they still see their biological dad too and wants a relationship with them. He said he left her due to him wanting a child and she didn’t and that he no longer love or has feelings for her but still wants a relationship with her kids however. When they separated they agreed that he isn’t to introduce these two children to any of his partners and that it’s a him and kids thing. He has them over for the weekends and helps out? Is this a normal situation