She was aware, but still made it very clear that she really wanted to have sex with me. I had no desire to hang on to my virginity, as I was 20 at the time, and she was gorgeous, so no complaints on my side!
I'll never forget it. After inserting about three quarters of my member, I got the classic "Oh my GOD! You're so BIG!", complete with writhing and gasping and all those other beautiful things women do in the throes of pleasure. I thought she might have been stroking my ego, but after she came twice, she had to pull off me and stop. She said that my size would take some getting used to. I'll never forget what she said then: "You're not bullshitting me, are you? There's no way you can be a virgin." Best first time EVAR.