Not quite the same scenario but I remember years ago a punt at 4 in the morning with a girl who kept nodding off during a BJ.
I had to keep nudging her and she'd go back to it for about 30 seconds then she stopped, asleep, again.
Went on for about 15 minutes, I found it really funny.
After the 15 mins I laid her back in mish and went at it like a demon to keep her awake.
Brilliant stuff and saw her about 5 times after for other meets. Memorable and still fancy her now.
Weird but out of the ordinary tends to make punts more memorable I find.