Im havin this party and i want to play games lik spin the bottle but mum is watchin us lik glue. Need Help!!!!

if it helps theyll be 40 of us and we're 14 also we have a swimming pool so i dont know whether that makes a difference . I reli want the parti to be a gud 1 also if anyone has any ideas on how i can mak it 1 ppl will remeber