Caught . . . . . . . . . . . .?

ok, so my boyfriend snuck me into his house the other night. it wasn't the first time we had done this, and my parents trust me, so they are ok with it, but his parents are a lot more strict with him. it ended up snowing while i was there, and we didnt notice, so there was a big car mark and footprints in his driveway when I left and his parents noticed. What do we do? and just to put it out there, im not a bad "kid" and im not irresponsible and its not like im 13. we are both 17 and we weren't doing anything bad