i have a gf who told me she was a virgin, so we got marry , but then after one week of our marry, a close friend of her told me that she was slept with her ex. so i try to conformed with her and asked if she had sex before and she said no..

so told her friend about it. and she told me that my gf is a lying about her virginity.. so she put her ex on the phone while i listened to the conversation, so as i listen the guy told her how he f*cked her and i was very pissed off.

so i asked my gf again is she really was a virgin before we got marry, this time she said the same answer. how can prove her that she is lying to me. is there any way i can find out, if she had sex before marry

so how can i guy know if this gf is a virgin or not