IDK, maybe I'm just not seeing it like other people, but to me it would feel too premature for Cindy to turn back to fucking Ian right now. Teasing? totally, but going all the way considering how hard she's still trying to convince herself and everyone else that she and Wade are happy? It would feel rushed. You have this delicious scenario where the lust and sexual frustration has never been higher between Ian and Cindy (seriously, having an amazing fuck that gets aborted just as it reaches its peak is worse then not having the sex at all), and any writer would feel it a damn shame not to milk that a little. Make them suffer a bit before the pay-off where they're fucking like rabbits behind their friend's backs. lol