The boyfriend and the son

After Betty Cooper meets the son of her mothers boyfriend, Jughead Jones, she can't stop thinking about him. Even the mysterious loner Jughead finds interest in the perfect girl next door, who would become his step sister soon.
They start dating, but they're forced to keep their intense relationship a secret, so their parents won't find out.
Everything changes, when Alice and FP announce their upcoming wedding, which would lead to FP and Jughead moving in with Alice and Betty.
Will this affect Bettys and Jugheads relationship?
Will Alice and FP eventually find out about everything?