So embarrassing... His mom walked in on us having sex!!!

My boyfriend has owned his own house for a year now he gave a extra pair of keys to his parents in case of an emergency. Last night around 7 we were having sex. We had the music on and very into the moment when all of a sudden his mom walked right in didn't knock nothing. It was so embarrassing she seen me riding her son's dick. My boobs everything. She quickly shut the door. We both jumped up got dressed. I was way to embarrassed to go out to see what she wanted. My boyfriend talked to her she left now we have Easter on Sunday. How I'm I going to get through this....