talia bringing bruce to her bedroom ready to fuck, keeping his gaze occupied with her face and her body and her kisses, so he doesn't notice the little boy just barely dodging the corner of his eye. only when he's naked and hopelessly bound up does talia call damian over to play. poor boy's nervous — he's been penetrated, but he's never done cowgirl before — so, obviously, he covers it up with entirely too much faux confidence. both his parents see right through it. bruce pretends he doesn't want this, but his cock throbs when damian tries and fails to guide it to his entrance (and tries, and fails, and tries, and fails, until talia chuckles and does it for him)
Aughhh Talia holding Bruce's cock and helping to guide it in with the other hand on Damian's lower back. Feeling his muscles tremble and jump as he slowly, inch by inch, takes it all. Kissing Damian's temple because he makes the sweetest noise as he bottoms out.
Bruce couldn't move even if he wanted to, but the way Damian clenches around him, leaning forward to rest his hands on Bruce's chest, he doesn't even need to to feel like he's being pushed towards the edge. He plays along with Talia and Damian's game so smoothly... asks in this perfectly wrecked voice for Damian to stop this madness, all so Damian can press his lips together and raise his little chin and do his best.