Klaus didn't know what went on in Maud's head. However, she suddenly moved her body down, making sure her pussy was touching his stiff, hard dick.
Her warning not to overtouch followed, of course. However, the fact that she took the initiative to make the first move shows she wanted it but was too shy to admit it.
Of course, there is a chance she merely wanted Klaus to feel comfortable, at least.
They, after all, are limited to what they can do inside the pool, which has now even cocooned them inside.
This means, aside from humping him, considering she is on top, Klaus could only play with her butt and hope that when all of this is over, they can have more fun.
Absorbing the liquid is very important. That is why they are there. The sexual tension was just something that had been building for a while.
So while it is nice to feel her pussy on his dick, it wasn't like he could fuck her inside.
