In the TV series Dwelling House, was seaweed a virgin when she had sex with Song Siming for the first time? why

I am not a virgin. Before knowing Song Siming, seaweed and Beckham had sex, but the shot was very short. A shot passed quickly. Seaweed and Beckham chatted for a while, then Beckham hinted that seaweed went to bed together, and then the camera arrived the next morning. I don't know how many times seaweed had sex with Beckham this time, but when I was with Song Siming, seaweed was gone. Song Siming thinks that seaweed was given to him for the first time because Song Siming was drunk that night and had sex with seaweed. The next day, Song Siming found blood on the mat of his SUV seat and thought it was the virgin blood of seaweed. After finishing with Song Siming, seaweed returned to Beckham's home and rushed into the bathroom directly after returning home. After that, Beckham came back. Seaweed said it was an official holiday, so let Beckham bring her sanitary napkins and underwear!