Is It Possible To Test Virginity?

Hi I just want to ask act one of my best friend(female) who is unmarried she had a sex with her boyfriend she told me that it happens 1 year ago now they are seprit thy don't hve any realattionship anymore but she is ver scared now bcoz her famly wants to get merry with another boy she is thinking he'll find out on first night that she had already sex with somebody else if not bleeding on that night I just want to knw is that true her husband will find out she already had sex and How??? And also do u hve any anwser what she can do on her merrige night to satisfy her husband??? Appki bohat mehrbani hogi anser danay ki kyon k woh bohatttt pershan hai aur apni iss galti per bohatt sharmida bhi hai tou plzzzz app iss ka answer dy dain takay mein usko bataon takay uska dar hatam ho. Thank u