the exact moment a play partner became a real friend...

curious if anyone else has had this specific moment. we'd been playing with a couple casually for about a year, fun nights, no drama, light texting between meet ups. then one of them went thru a big health scare and we ended up driving 4 hrs to be at the hospital. nothing sexual, just sitting in a waiting room with them at 3am holding coffee. since then the friendship has been the main thing and the play is the bonus. anyone else have a specific moment where the dynamic flipped from play to genuine close friends