I had been working on some of the capture animations that are performed when you grab one of the girls. In this instance part of the game's mechanics doesn't just need you to have sex with the girls, in fact you'll need to work your way up to it.

So there will be three states of control, Punish, Foreplay and then Sex. 

For this instance the Punish portion is about reducing the resistance of your prey, making it easier to keep hold of the character before they can escape your grip and you have to chase them down again.

Usually this will involve ways to put pressure on body parts, weaken muscles or exhaust them.

Now you could go straight into Foreplay but likely the victim will get away quickly before you can get their motor running. And in order to get to active penetration they need to be some what aroused before that can happen.

Punish -> Weaken
Foreplay -> Make aroused
Sex -> End goal.