Im not a very touchy feely mum anyway, so no I wouldnt have done this, but if nothing happened, id tell his son to get over it ........really I would
Ah yes, let's invalidate this person's feelings.
I'm thinking if this where a father/daughter situation and a guy said 'get over it' he would be missing a pair of gonads! [PLEASE tell me I'm wrong...]
Here, let me repost what BigTex said once already:
It's certainly boundary crossing, if not outright emotional incest.
...I'm thinking a 'violation of trust' between mother and son. Yes it does happen...I know from experience...