A hundred years ago and more, a woman would fake it by causing herself to bleed on the wedding night with a pin. I'm not sure it's worth doing that, but some cultures are more harsh than others to women who are not virgins.
Hi there. Well, you are not a virgin hon. You've had sex at least 20 times.
If you are asking how you can 'fake' being a virgin with your new husband. Well, you don't have to divulge/tell your past. That is your private business. Just don't share. I wouldn't lie about it. But I also wouldn't talk about it period. Not every woman bleeds upon first intercourse. The other thing you can do, there is a surgery called hymenoplasty. This restores the hymen. You aren't a virgin again but it does aid in faking it.
good luck