No, but she can't stop herself.

"NO. SLAVE."

Her eyes go wide in horror. There is no way she can suppress the rising tide of her arousal.

"Aaaaaaaaaaaaaahhhhhhhhh!" She rolls her head back and cries out her unauthorized orgasm. Even while her core contracts in ecstasy she sobs at her failure.

You continue to pump into her bound tits. She must be punished, you think.