Is there any way to have penetrative sex in the partner route?
I'll post here a text I wrote on this subject on another website
Yes, there will be a lot more!
The idea is to be able to realize all the, shall we say, sexual possibilities with your partner... BUT ... just like in real life, things are different.
It's one thing to have a slave that you can boss around and he does what you want...
It's quite another to have a relationship and convince someone to go further.
In the second case, it takes time and convincing and you won't always get everything you want.
That's how I imagine this route...
it's going to take longer to go further and there's not going to be a recipe to follow... each character is going to have their own story and depending on how you got close to them there's going to be more or less sex scenes.
Likewise,
depending on the character's personality, he'll be more willing to fulfill more fantasies and fetishes while others will stick to the basics.