Hey Turtle. Nothing is actually required after the fact with an out call girl. With that being said, there is nothing wrong with offering her the opportunity to use your shower (maybe you can hop in too) and you can always leave things out like mouthwash. I personally wouldn't offer a girl a toothbrush, as hygienically proper that seems, it may also seem insulting. But with that being said, I try to keep anything that they may possible need within reach, or even out in the bathroom, and let them know that they can use anything when they are in there.