secret affairs, is it advisable?

Secret affairs are never advisable. They never remain secret very long. Unconscious changes of behavior will give one away sooner or late. I wouldn’t think the fear of being found out would be worth it. Besides having a secret affairs means one is dishonest, a thief. A thief because one having the affair is steeling time and affection that does not belong to him or her.

NO, one way or another the truth will come out in the end, and If you disrespect her enough to cheat, why not just leav then maybe yoiu both could be happy