Me and my girlfriend was making out today, and a point she had no panties on, i had short pants on and underwear, there was a wet dot on the right side of my pants where my penis was, About 20 mins later I lay ontop of her and grinded only for a second on her, I am not sure if that wet spot came in contact with her place, I did pee before this and i read that sperm can die in ten min in air, can she get pregnant