Matt did breathe and he tried desperately to contain himself. Matt looked at Bruce's twin and smiled before letting his lover lead him away.
Matt groaned into the kiss Bruce offered, closing his eyes. Matt breathed out hard through his nose and curled his arms around Bruce's neck, kissing him deeply.
Bruce blinked, watching the pair walk away. If he followed, it would be awkward. If he didn't he'd be standing there by himself. With an exasperated sigh Bruce elected to follow them. If it got to be too much he could always leave.