Spouses to not count or I would have everyone beat.
Once by a provider many about 15 years ago. I can't remember her name but she just had a baby, D+ boobs, lactating, but after I started dining, the tap after 5 or so minutes.
a dreaded tap on the head/shoulders/body indicating “that’s it, i’m done” in orher words “that’s enuf - just not doing anything for me” ...
and not in a “i’m tapped out and cannot go & cum anymore” manner?