See, this is the thing that drives me up the wall (I know you said no ripping, so I'm trying to be gentle). What right do they have to be pissed about the fact that they were both with him? He was in the middle of deleting his brain. Maria had already called him a fucking lunatic. Pepper knew his memory was going. If anything, from a completely logical standpoint, they took advantage of him not being in his right mind. And the writer can call it heat of the moment as much as he wants, that doesn't make it look any less skeevy. And yet Tony's going to be the one taking the heat, because Fraction always has to have the relationship hinge on the guy.