It does sound as if she wants *him*, not her own family or other friends. And that may be a line in the sand that's worth drawing, but it should be with the full cognizance that's what she's doing.

So: If that's what she thinks she needs, then talk to him about it and make it clear. But problem solve first. Would going to hang out with her biofamily be OK? Would doing something outside the box like a spa session with friends work? Explore options. But also explore your relationship.