His body tensed just a little as she entered him, pushing past the tight ring and his fingers dug into Steve's shoulders as he pushed back on them, impaling himself more. God, he loved when she did that to him. Maybe Pepper could convince Steve to let Tony fuck him. If anyone could do it, it'd be her. He slowly pushed the head of his cock in Steve's mouth, trying not to thrust into it. "Oh god...I'm coming..." and Tony made the most sinful mixture of noises, growling at the first shot of come down Steve's throat, that quickly diminished into lots of whimpering as he buried his fingers in his hair, tensing up all over.