That last one gets tricky involving the parents. If your friend says parents are having issues & theyvarevtrying to hide it & your friend confides there are problems the parents might not appreciate their kid has said anything & it might end up getting your friend in trouble. In looking at the big picture, yoyr friend will tell you as much as yku need to know & will also be sensitive to yiur sensitivity that something is whong & be more cautions about when inviting you over. Parents dont like dirty laundry (msrrisge problems) being passed around to others usually especially if trying to hide it in their own house when outsiders ate around.....just some inside tips from a parent who has been there.