Maybe not trash, but it wouldn't surprise me if she didn't make "suggestions" that your H picks up on... I have thought the same thing a few times when my H has said something that was so far out in left field, even way out of character for the kinds of mean/sad things he would normally say to me in the course of one of his relationship spews. I figure OW has 'contributed' some of those ideas...lovely!!
But just develop that duck's back and let it roll right off...you know what's true!