i think tim is a pervert..you're gonna tell me well yes obviously but like..hear me out
he already had some voyeurism issues but they got 10x worse when he moved into the manor full time because he had access to everything now, so obviously he's not gonna private himself.
it just started as getting an unfortunate boner, jerking off to the pictures he already had, teenage hormones.
then he ..'accidentally'..stumbled in the bathroom when bruce was showering, he was met with the naked man rubbing himself with soap all over, that manhood so big, lathered in product, and those muscle.
naturally he got a boner, and left quickly to rub one off.
and then it evolved into peeking to see bruce or dick showering, rubbing soap, sometimes even jerking off in the showers for a bit of 'relaxation'.
he tried taking some pictures— and he did! and jerked off on them a lot but it wasn't enough, so the natural continuation is stealing their underwears.
he loved the scent, the manly scent radiating off of bruce's underwears was intoxicating, he got dizzy countless of times smelling them, sometimes even going as far as gagging himself with the clothing.
and bruce? well obviously he noticed, he didn't take it further..not yet..not until timmy made the first step, but he started leaving sweaty gym clothing and his underwears in places tim would find, and when he knew tim was peeking he'd start masturbating and then he'd also start getting into anal territory, fingering himself infront of a very-hard-to-be-descreet-tim.
Absolutely yesssss to all 300% true.
Tim has invented new ways to hide cameras, but Bruce and Dick know it, right? They know how little Timmy is, so they are aware of the placement for those cameras...
What do they do? Well, they put up a show. They put themselves in the best positions, a good angle for Tim to touch himself, and maybe they play a little dirty one night when they're together... Dick starts massaging Bruce's scalp, both looking into a very difficult job, while Tim is in his room where he's supposed to be sleeping already. No school tomorrow. No patrol that night. Just a show.
At least that was the plan.
Then Dick sits himself on Bruce's lap, removes his domino mask and begins to kiss his mentor with such obscenity they both moan like whores.
Poor Timmy is jerking himself raw at this point. That is until Bruce looks straight to the latest hidden camera and whispers "Come".
Tim comes. But did Bruce mean that, or that he should come down with them and join the party?