Aside from a massage, I have exchanged several emails with the parlor and have mentioned that I am happy to offer more than just a massage. My fee is $80 per 30 minutes, $100 per 45 minutes, $140 per hour, and any money spent on extras will be mine. There is an option for me to work part-time or casually, which is what I am opting for right now because I already have a full-time job and don't want to throw myself into working full time as a masseuse/escort at the moment. Should I accept this offer?

Do you love being an Erotic Masseuse? If yes, then it would be nice to do a part time so you can do the thing you love. 

Then go part time so you'll have time with your day job and then do your hobby at night 😉