I can honestly say that I wasn't snooping, she never asks for money so I've always checked her purse and if she hasn't any I give it.Shes happy with that. I even gave her a locking tin to keep her diary in as I know her grandparents snooped

Then all I can say is that you shouldn't be upset when you find something you don't want to find. If she knows that you go into her purse all the time then she obviously wasn't being sneaky about the condom because she knew you'd see it.