I would have been a little concerned but the fact that H does not habitualy talk to S every day is good and telling. Good in that you have an excuse , as some stage in the future H will call you on this and accuse you of blocking access to his son or something like that. You can then calmly tell him that he had him the night before he went away and as he does not usualy contact him every day you did not see it as a big deal to ensure that you were home " just in case he called". Telling in that this whole thing realy about wanting contact with you to reasure himself that you are "settled".
He may still have a nice time but its not going to be as easy .
I dont think he is detached from Sunny at all. Now you are Sexy , independent and a CHALLENGE , that = Attractive.
Some would shy away from this but I dont think your H will , I think he is someone who is used to winning and will take up the challenge.
