I've ended 2 marriage's in my lifetime. Both were in need, one was a skank, the other one hadn't been with her husband in over 3 years sexually. First one I was young, just out of highschool and she got married at 18. I thought we had something, again I was young and dumb. Getto as fuck but good lookin, bish got prego by another dude so I bounced and joined military shortly after.
2nd one was just about 3 years ago, met her through work. Banged it out for about 7 months, I was married at the time too. Was going through divorce but not at first. She was unhappy as fuck and originally was just a fuck buddy then she wanted something more serious, I had to dip. Got orders overseas.
Both came with drama, but the second one was on my side not from her husband. Only about got caught once at a lunch at her place fuck, her dog saved us....
I'd say do it.