got caught by his mom

I was invited by my boyfriend's mother to stay at her house since my student house was being renovated for the summer . Until now everything was great but I am crying cause she was my boyfriend and I having sex . I was in a very vulnerable position and no one should have seen that . She just opened the door I thought she was sleeping but slammed the door and ran I guess . I don't even want to leave the room. My bf is talking to her . This sucks