After growing up eavesdropping on his mother bragging about what a proficient lover his father is Damian decides to check for himself. He chooses a night where Bruce is hopped up on painkillers but not entirely knocked out- he assumes that sexual arousal is affected by the soporific effects of "the good stuff" as Todd calls it and as a result he won't be able to "get it up" if he were too loaded up.
So in he sneaks to his father's room, where the man sleeps stretched out on his back. His breaths whistle faintly thanks to the broken nose he sustained when one nefarious goon hit him in the face with a two by four. Effective but hardly a warriors weapon.
Still, it gives Damian an audible indicator that his father is indeed asleep. He barely stirs when he claps his hands near his ears, too. Perfect. He fishes into his father's boxers without hesitation, grasping the flesh that helped sire him in one confident hand.
"hmph." He grumbles, letting the appendage rest soft on his hand. "Surely this isn't anything to brag about. It's so... Soft. And small. I hardly see why mother would brag about this."
But as he handles it it starts to grow harder in his hand. To his surprise it grows in length and thickness, too, until he can barely wrap his fingers around it.
For some reason it makes him press his thighs together. He's surprised at the slick " squish" he feels when he does so. What is going on? He's never felt anything like this before!
And then Bruce gives a groggy groan. His eyes squint against the lamp light Pennyworth had left on before he headed to bed to focus on Damian.
He expects his father to yell at him. He doesn't expect him to grunt in way he's never heard him do before and say "Talia?"
...he certainly doesn't expect his father to pull him him down into bed with him with his member somehow coming to rest hot and rigid between Damian's own legs.
ughghghhh I love. Just groggy Bruce fucking Damian and thinking all the while it's Talia is so!! Whispering her name into Damian's neck, telling Damian how much he missed her, how good he feels. How wet. Just like he remembers. Better, even. How did he ever let her slip through his fingers—
And Damian can't keep up, can barely breathe. Sure, he's familiar with the intricacies of sex, what it means and entails, but your first time is your first time, and his father is much too large for him to take easily or comfortably. And Talia was of course correct, Bruce is a proficient lover. Damian shakes apart and comes on his cock until he loses count. Until he can do little more than roll over and pass out once his father's had enough, right back to his sleep-heavy, nasaley breathing.
Then when Bruce finally comes to in the morning, thinking maybe it was just a concussiom dream or a drug-induced vision, opening his eyes to see Damian dead to the world beside him and thoroughly debauched. Not Talia. He'd have to be a fool to ignore what his own eyes are telling him, but boy if he doesn't try.