Will any husband go back to their ex mistress after the affair ends for the third times 2-3 months ago?

Well, considering they broke up 2-3 months ago and you are married, I could see why you would be suspicious, you know what they say... once a cheater always a cheater. Whether or not he is with her, you should beat him to the first punch, before you look like an idiot. Guys are pigs, we should know that by now.

Good luck!