I could imagine that the blackmail of Jill was not even thought up by Tybalt. In my opinion, it is a master plan to marry into the Royce family.
Provocative theory
Tybalt and Stephen, as I see it, are under the thrall of Jade. As the saying goes, "Behind a strong man, there's a strong woman."
What if Jade got involved with the MC to keep the MC away from Jill?
What if Stephen got the video of MC and Jade just to see him get screwed by Jade? That he gets angry and gathers what little courage he has to put Jade in her place?
Maybe Jade is the mastermind?
If you compare Tybalt's complexion to Lynette's father's complexion, they are very similar. I even assume that Tybalt is only Stephen's stepson.
What if he is the child of Jade and Lynette's father (Burgmeister)?
Rusty mentions something about "purebred"?
Wouldn't that be funny if three guys who might be brothers (Rusty, Tybalt, MC) wanted the same woman (Jill).
Just a few thoughts