Details please pm!
Had this a few times. Usually a mid to late 20’s and then one around 50 though. Same thing, the younger one ploughing through 30 min sessions and the other available after.
Last time I finished the session and on way out the older asked if I enjoyed, said yes but would have liked more and more time. She said $100 and I will help you, told her I only had a $50 which she agreed to so thought why not, not the best but for $50 and she was still ok looking.
I find it more common in Sydney though.