If she was used to being fucked by her well-hung ex-husband, which she obviously was, a smaller dick was never going to keep her sexually satisfied long term was it. Both you and her knew that from day one and her ex-husband just had to sit back and wait, knowing full well it was only a matter of time before she'd call him for sex again. Hung guys are held in a God like status by almost every woman who has ever been sexually pleasured by a well-endowed guy in the past and is highly sort after by women who are still to find that hung guy to pleasure her with a bigger than average sized dick. You say she still fucks him from time to time; my guess is it's you that she fucks from time to time now and she fucks him every chance she gets. Now that she's been back with her hung ex again, she's not going to risk him giving up on her if he's only getting sex from her occasionally, so you can rest assured he's pounding you wife's little married pussy for her whenever and however he wants. have fun