I Would Like To Have , But I Ain't Very Large?

I Met This Girl. She Is Very Pretty And y. I Am Pre-Pubescent so i ain't the biggest ever. i wan't to have with her, but i am 12 and she is 15 she has a 2 year old baby, so apparently she knows about . i am a virgin, but i know she likes them "LarGe" and i am pre-pubescent so i haven't gotten large yet. we plan on having soon so is there any way (besides male enhancement) to make myself larger, because i have no time to wait for it in the mail i will probly be having tomorow or the day after, so is there any way of making myself large because i dont wanna be embared. and please no answers like "you shouldn't be having sex at your age" because that helps my subject in no way.