My mom walked in. What now?

So lately I've been video chatting with a really cute guy, that is also very nice and respectable. So i never wear makeup right?

Only when i cosplay, and i was cosplaying before talking to him and Didn't take it off.

So we were chatting about the russian language and all of a sudden mom came in and started screaming, thinking it was my best friend. Then i told her and she thought i was putting on a show for him; like a slut. So i ended the call. SHE DOESNT BELIEVE ME HE IS 17. ONLY 2 YEARS OLDER. i talked to him later and asked if i was slutty. He said "No! WTf? Who said that" he isnt like that... what now?