A dear friend separated from his partner three years ago all amicable, although initially not his decision.
DF moved to family members house who had severe health issues so having son over was difficult. DF saw son (5) very regularly would go to ex’s house a few times a week and over one day at the weekend, take him out for lunch, the park etc and rightly pays maintenance.
Ex has new partner who is moving in, Ex new partner started to feel uncomfortable with DF going over to the house very regularly.
Ex GF started to change planned arrangements which meant DF couldn’t do things he had planned. DF now wants to take son out for longer than a couple of hours and would like son to stay overnight.
EX GF states that son does not want to go out with DF, he only wants to see him at her home with her there and only for a couple of hours here and there and will not let DF take son out without her.
Is this reasonable? Can EX GF stipulate this? If not what can be done to resolve the issue.