For me- the answer is No. If he fool around, there is no more
trust.
I'll definately divorce & take the kids, sue him for all his
assets. That's why he dare not. Ha, ha.
Tell your colleague to spend more time with wife &
family.
Buy her something expensive, wine & dine her. Stop going out
with friends. If need to, keep to once a week. Come home early, can
also bring her along.