In the meantime, he should quit trying to control his stbx, decide his own boundaries, and enforce them. So, what to do in this particular case?
STBXW: Hey, is it OK if I date? Friend: That is really your choice. I prefer that you be honest with me about it.
Oldtimer,
Great stuff -- I will pass that along. I wanted to ask you though, since I know this guy pretty well and I know what his boundary WOULD BE, and it would be: STBXW: Hey, is it OK if I date?
Friend: That is really your choice. I prefer that you not, to be honest with you.
Is that appropriate? It would certainly be HONEST.