They never said explicity that Tom cheated, as I recall, only hinted at it. And I think they've totally dropped that minor point and are hoping that no one ever remembers it.
I'm glad they're moving the Applewhite story along at last, even if it has to be this way. Anyone not guess that the Michael Ironside character was going to fall through the stairs after Betty commented earlier in the ep that the rotten wood was going to kill one of them? And I agree that handling of the body was really clumsy. "Wait, the keys fell in there!" Riiiiiight. That happens all the time. And yes, they would have left trace evidence all over the car. And didn't they load the body in broad daylight, in front of their house?
Meanwhile, we are busy throwing character out the window for the sake of story. Wasn't it just an ep or two ago that Gaby was insanely jealous of a nun who was paying attention to Carlos? And now she wants him to go have an affair? If she's looking for something to lord over him to even the score, uh, how about the fact that he's a convicted felon? Meanwhile, Carlos, who in the nun episodes was suddenly totally devout, now appears to be seriously considering adultery -- and with another married person, no less! And does anyone actually believe that, even if you buy that, he'd really think Lynette was into it? I kind of liked the "kiss" story up until those points; it was nice to have some of the characters interacting, and a relief to have a Lynette plotline that had nothing to do with her office or her kids. But then it went off the rails, throwing character consistency out for the sake of a story that is disposable anyway.
If only James Denton weren't bringing in the ladies, they could write him out. His character serves no purpose anymore.