Legal Question in Family Law in Virginia

Cohabitation by definition implies sexual relations. So, if such are demonstrably absent from these overnight visits, they should not present a problem (in my opinion).

If you are trying to abide by the spirit of the decree, the answer to your question is yes -- no overnight visits.

If it's an unrelated person of the opposite sex, and the stay is overnight, it would be take a major age difference (think really old) or some other pursuasive evidence to overcome the presumption that the overnight stay involved sleeping together.