As a prostitute Abby has sex with numerous women but (almost) never takes her bra or panties off, and most of her clients don't either, only Sam ever takes her bra off. The only time Abby is naked while having sex is near the end merely to reveal to her wife Kate that she is working as a prostitute.
Working as a prostitute Abby never locks the door to her apartment when she is entertaining clients, meaning her contractor Justin just walks in unannounced several times, as does her wife Kate when she discovers her infidelity.