The slow pace that Tony's giving to him claws at his control, the slow drag of fingers leave a trail of heat in their wake, burning against his skin that heats his entire body up. Bruce makes a series of muffled, cut off sounds as his hips jerk minutely, trying to control himself as much as possible for Tony's sake. He asked, after all, and Bruce has no reason to not follow.

"Tony," he breathes his name out, inhales it back in and moans softly as he watches Tony getting himself ready through half-lidded eyes. He shifts, getting himself comfortable as Tony leans in and starts to slowly push himself in, and the sensation is not unlike a slow burn. Bruce closes his eyes and forces himself to breathe deep again, relaxing as much as he could while Tony enters inside of him. His curls his fingers into the bedsheets, fisting them to hold himself steady through this.

Bruce breathes in and then out with Tony's name on his lips once more, saying it like a mantra as he waits for Tony to settle himself properly inside him.