What should I do when this happens? I really need some good advice. kinda awkward?

okay well this is weird but when i'm with my boyfriend and we're snuggling i will get "wet" ya know, down there. and we're both 15 and never done anything ual, so ya. but i'm always afraid its gonna show through my pants or leave a spot on the couch or something. it never has. could that happen? it always just feels really uncomfortable when it happens. what should i do? will it show through? or am i just paranoid?