I'll give you some sound advice dude cos your a good guy.
I'm speaking in general terms here so not necessarily about the man in question here specifically.
Young guys often make the mistake of messing with older guys wives/girls in their fifties/sixties on the basis that there wont be any consequences because:
a) They don't work out, they are nothing to look at unattractive, fat, beta and you can smash their faces in a fight etc
...they see this as weakness which they can exploit and mess with their relationships etc
While each situations is different what the younger guys don't see and cant know is the guys bank balance, his possible networks/connections/influence etc
Real life situations are never dealt with in terms of how you look, how physically strong you are or the size of your biceps (that's just delusional)
Older guys have been around a long time, they know "whats up" and "how things work", they are experienced dudes generally with not much left to look forward in life yet with everything to protect for their families etc......dangerous combo.
God forbid you walk into one of those total assholes on a power trip who has the resources and capability to ruin your life in a multitude of ways.
Smart guys never do their dirty work remember and they don't play by the rules
Not sure that's worth the risk for 6/10 two dime a dozen chick you don't even have feelings for and would forget about after the 2nd or 3rd fuck.
My advice is stay well clear unless you actually had genuine feelings for her.