help im confused

why does my girlfriends dried cum smell a little like pee? is that normal? like i made her supper wet and it went through her pants and the next day i smelt something when i was doing the laundry and i smelt her pants she wore that day it it kinda smelt like pee and so i asked her to smell it and she also said it kinda did too. she swore she didn't pee.... is that normal or should i have her get it checked out? or was she so relaxed that a little came out?(she said that she didnt need to pee at the time)