Had an emotional breakdown in front of a provider. She was very accomodating with the sudden outburst of tears. This was obviously not on her menu. What would have been an appropriate tip?

and for a longer session.

I've had guys break down in front of me and not tip a thing. Why should they? I would much rather have a client who felt comfortable enough with me to tear up a little and return for more fun, than a client who tips me fifty bucks and never returns. Fuck that.  

This happens more times then People think. Ive had a few gents that felt comfortable enough with me to be emotional. Or it just happened?  As long as she wasnt uncomfortable and didnt make you feel bad about it then no worries. That's sweet that you want to tip her but the best tip is rebooking.