We separated at the end of December. Three children aged 8, 11 and 15. He is having them to stay every other weekend. This weekend he has decided to introduce his girlfriend which I think is very early (6 weeks). Now he has told me she will be staying the night as well. Surely this is far far too early. A terrible role model for the children and what kind of emotional effect will it have on them... interested to hear others' experiences.