Shock experience with my girlfriend

Wow i had some very naughty sex with My girlfriend last night.. She was wanking me and playing with my balls, i was feeling so horny while she was tickling my freshly shaven bum hole that i reached down and pushed her finger inside me deeper... She has done this b4 but isnt usually into it... My mind was racing due to all the porn i had been looking at earlier in the day, that i completely forgot who i was with. I pulled her hand away and up to my mouth and sucked on her finger that was just inside my ass. Then she started to play with my cock again, i have no idea why but i then put my own fingers in my mouth lubed them up and pushed 2, then 3 fingers deep in my ass while she continued to toss me off.. I pulled them out, sucked on them and re-inserted them inside me.. I came everywhere, all over myself. Neither of us have mentioned it since... Does she know something? Or just going along with my pleasure. I have no idea