OH JESUS THIS IS AWKWARD WHAT SHOULD I DO!?

ok so i was at my girlfriends house and we were makin out on her couch after he parents went to bed...AND HER MOM CAUGHT US! we were getting pretty 'hot and heavy' i'll say (thank god i choose not to take her or my clothes off) when all the sudden we heard 'Oh THAT'S appropriate' WHAM freaked us right out! i think you should know...her mom is effin SCARY!!...should i like not go to my girls house till things cool down or should i just play it off like 'ha-ha yea you caught us' (she once threatened to kick my *** cuz of a hickey she saw on my girlfriends neck i should mention)