Yvette & Lena, double-buttdrop and body-bounce

Lena does some buttdrops on her slave, but she's a lightweight and she does it softly... to comfortable for the slave.

Then Yvette enters the scene and shows her like it has to be done, her bigger weight does some more impact...

and for more impact they double the action, Yvette lifts Lena on her lap and lands with a big impact on his body....