Nice going setting dude straight ... yeah he is definately trying to push himself in. Some guys are like that .. maybe it works for them, seems your fella has a few drinks to courage up ... I did like how you recognize your own vulnerability and the fact he might exploit that ... thats amazing self awareness.
You touched on the kids. Back .. 7 months ago or so ... I had dropped rope and a long time friend of mine who has been divorced a few years contacted me out of no-where. Evidently she got wind of my situation, there was always that flirt vibe between us. Anyways she invited me over, her kids were there and I never really thought much of it as .. I was just there hanging out .. not looking to pursue ANY R ... after some wine my "uh oh radar" went off and realized she had other thoughts. She pressed that we all do something the following weekend, her I and ALL the kids ... I, like you, put the hammer down and was very clear I would not do that to me S, he seen W basically create a new family after she left ours in a matter of months ... no way would I throw that curve ball at him .. I am his rock and his needs outweighed mine (Besides not being interested really helped)
So I truly respect you and what you did, very proud of you and how you are handling things and carrying yourself Mighty .. keep going you are going to be more than fine.