Bucky had to curl his toes in effort not to come when she tightened around him. "I think it might be a little bit of both. Though I think it's more you got tighter." He didn't think he got bigger. Though it wasn't like he'd ever really measured himself.
With a few heavy pants he pulled back. With but a second's breath he slammed his cock right back home. A thick heavy grunt rumbling in his throat. "Yep. Definitely you're tighter."