There are different reasons why a girl might lie about her virginity even if she is not a virgin anymore. Some possible reasons may include societal pressure to maintain virginity, fear of judgment or rejection, desire to conform to certain cultural or religious beliefs, or simply wanting to present a certain image to others.
It is important to note that a person's sexual history should not be a source of shame or judgment, and it is always important to prioritize honesty and open communication in any relationship. If you are in a situation where someone has lied about their sexual history, it is important to approach the conversation with empathy and understanding, while also establishing clear boundaries and expectations moving forward.