Julia-Eva want to hear music without disturbing, but also she wants to have total control over her slave.
So she wears closed headphones and for the total control she sits on her slave.
She shakes and moves to the beat of the music, while she has him properly between her strong thighs or his face under her ass.
She forgets on what she shakes and bounces, so she drops sometimes hard down her dancefloor, but with her ears in the headphones, his noise don't disturb her fun.
He is definitively born to be a dancefloor for the lady.