Replying to NS this is the time i will need you the most, im fucked.

heres the deal. im 17. yesterday me and my buddy went and got fake ids made. friday we leave with 14 other friends on a cottage trip for the week. today i went in to buy my liquor with my fake, and the lady questions it (out of provice) looks it up in the official book and says sorry i cant sell this to you. and gives me back my id. so im like ok thats fine i have my id ill try somewhere else. as soon as i go to walk out, BAM i get a solid look at the other cashier, and its my fucking neighbour (45 year old mom). FUCK FUCK FUCK. she watched the whole thing. FUCK. she gets off work i assume when the store closes at 9 and shes CLOSE with my parents. how the FUCK do get her not to tell them? she will. and ive gone through every scenario possible to make up a s tory when my parents confront me and i said to much shit at the liquor store to make something up. ive spent an hour thinking. so the question is what do i say to this lady, as soon as she gets home, to get her to keep what happened to her self. i know if my rents find out they wont let me go on this trip and that is a fucking shit hole grounding because this trip has been planned for months and months.

help me NS