got caught

my partner and i were playin around last night, havent done anything like this since weve been together. it got kinda kinky, but in a fun way. i dont think they expected me to be that into it though. after we finished, my partner looked at me funny for a bit, then asked if everything was okay. i laughed and said its all good, just havent had some of these urges in a while. should i tell them about the fantasy stuff? or keep it casual like this?