Quicksilver looming close enough to have his damned nose broken again was more than enough to put Tony on edge, tensed up to spring. Wanda's leap was like snapping a mousetrap, Tony trusting the sound cloaks and solid armor to make the abrupt fall backwards onto his ass on the floor less traumatic than it should have been. It was still pretty traumatic, but at least it was silently traumatic. When he was done wondering if that would leave a bruise, the situation didn't get any less strange; he was watching Wanda come up for air after kissing her twinbrother on the mouth.
Now, Tony was an only child, but he was pretty sure that wasn't normal sibling behaviour. Not even twin behaviour. Lesbian twins, maybe, with webcams, but nobody real.
He did suppress that fantasy, right? It didn't just drive him crazy. Right?