Help! I got caught having sex by my brother.?

My sister walked in on me having sex, We had just started and he was eating me out and she walked in to find a shirt, She looked at me and was like Wow.. grabbed the shirt from my closet and walked out. I feel your akwardness. Mabey you should talk to your brother and explain things. It might help. And I wouldnt lie because even if she believes you now, if she finds out in the future she wont trust you!