Somewhat in the same situation here: older girls are certified with interest, younger sister has another year before she can do the open water course (has to be 12). Mom had ZERO interest in diving ;-0 but had such a good time snorkeling while on vacation that she's given me permission to look at potential summer vacation locations that will allow the divers to dive, and the others to do something above the waves.
And look: there's summer just 300 days away.........
And look: there's summer just 300 days away.........