Sex.
My brain wrote fanfiction of my OCS while I was sleeping. The oc hyperfixation is growing now they're appearing in my dreams in the worst way possible.
Ever since their mutual friend left, something in Cactie changed. He had grown possessive of the other girl his friend left behind, Lucinda, and their new friend, Finn. It was ignorable at first, but eventually no one could ignore it. Lucinda's boyfriends/dates would abruptly break up with her talking about Cactie threatening them with his nailed bat, or Finn's new friends suddenly avoiding him for the same reason.
Now 16, Lucinda still desires the feeling of a relationship, and wishes to know about the experience of sex. Cactie would never allow her to have a relationship let alone have sex, and to keep Lucinda from leaving him, he offers to date her. Lucinda agrees. Yet feels more like friends with benefits.
The idea becomes a regret when Cactie is calling Lucinda on the phone panicking about some unwanted news.