In Reynes' Syndrome, Rebecca experienced her 1st sexual encounter at age 15. Alessa does so in this story at age 19. She is 6'2" tall, and has that handicap to deal with as well as being totally flat-chested. Thankfully, 6'5" tall Matthew takes note of her in school and mounts a pursuit. (Truro virus stops sexual development of infected girls in its tracks at age 11. They continue to develop physically, but without changes wrought by puberty. They never develop breasts, or pubic hair.)