Conversation so far:
who played the mother in parent trap 2
Hayley Mills portrays both single mother Sharon Ferris and married twin sister Susan Carey in The Parent Trap II.
did the hayley mills star in the original parent trap film
Hayley Mills is the only actress that returned from the original Parent Trap film.

Question: what is premise of the second film
Self-contained rewrite: what is the premise of the parent trap ii