In retrospect, it should have been more obvious that Tony had made a beeline for the wrong room. He didn't do it on purpose, at least he could tell himself that. He just made a beeline. Pietro was making undeniable needy little noises with every breath he stole and if Tony didn't hit a bed it was just going to be the floor where he sucked all of those breaths out of Pietro. In retrospect, maybe some of those noises were actual protests, but they didn't last long enough for Tony to dwell on them. In retrospect, he did spent a lot of time wondering about how he could smell Wanda's perfume on the pillows, but Pietro didn't seem to have any protest when Tony suddenly stopped announcing every word that popped into his head.
So, in retrospect, Tony was an asshole. Nothing new, but he did like to try to get away fom it when he could. This all became so clear at that tiny sound announcing Wanda's presence, and Tony didn't even need to turn and see her face to confirm the unavoidable fact. He was an asshole. He let out a slow breath across Pietro's back when the sound of her retreating footsteps faded, carefully touching the tip of his nose to Pietro's spine, waiting, listening, then leaving a kiss. He didn't need to extend the offense to Pietro, but right now he couldn't tell if it would be more offensive for Tony to assume he could lay a further hand on him, or to completely withdraw. With the kiss, Tony waited and listened again, hands just lightly touching Pietro's sides before he was gone.
He was at the top of the stairs when he heard the glass break, just shrugging his shirt on and abandoning it in his haste. He was two steps into the kitchen when his phone rang and that knot between his shoulders twisted and pulled his heart up into his throat and he couldn't do this anymore. He didn't want to know why Wanda was crying. He didn't want to talk her through it. He didn't even want to apologize for his obvious insult, not then, not even if he felt sick to the core with it and he would do anything to make her understand that and make her understand that he was sorry for all the other ways he hurt her and all the other ways he would keep hurting her, not when she was crying like that.
He backed out, slowly then, hands twisted in his shirt until he could turn away and make his escape.