There are so many parallels between D/s & 'straight' relationships- aftercare is yet another.

Suppose you meet a willing & attractive person at the hardware shop & invite them home for some fun. Would you leap off as soon as you'd had your first orgasm, & say 'that was fun, seeya' as you shove them out the door?

Not unless you're a complete asshole. If you really care for someone, you'll be there for them when they need you- D/s can bring up feelings she's never experienced.

Not only do you need to make sure she's OK, you need to make sure she knows she has a responsibility to yell out next day, or whatever if she's not. We need to be accessible.

It makes sense to spend some time caring & sharing after any intense experience.