Yes, Joy lets her leave

Joy looks triumphantly down at Michelle then diverts her attention to the panties. "Eww on second thought, you can keep these, they are still quite damp with what I assume are your juices" she tosses the panties at Michelle who manages to get up and grab her purse. With one hand glued to her chest she crosses her legs while bending down to grab the thrown panties while not exposing her pussy.

She quickly pulls them up her legs and turns to Joy. "I'm sorry for the toy, but you are such a bitch for doing this to me". Joy replies "Honestly I feel a lot better now that I've put you in your place. I'll call you again next I require your services" as she winks at Michelle and closes the door. "What makes her think I'll even come back after this? sigh the pay is good though and i guess i need my outfit back too". Michelle gets into her car and begins driving back home. She drives only one handed due to the other arm being plastered over her exposed breasts. She gets many looks from drivers around her as she becomes more aroused once again. This is due to a mixture of the attention, and her panties still being damp.

Michelle makes it home and quickly runs inside. She decides she wants to take a shower and goes into the bathroom to warm the water. As she looks in the mirror she sees her sexy form covered only in her gloves, stockings, and damp panties. She notices her nipples harden and says "on second thought, maybe I should finish what I started back at Joy's". She turns off the water and goes into her room and lays back on the bed. She pulls her panties off and plunges her gloved finger into herself and she begins to moan with increasing intensity and quickly begins quivering from an intense orgasm. "That felt incredible, maybe Joy has a point about screwing yourself silly" Michelle remarks as she begins to rub herself again.