It didn’t start innocently.
It started because Carly hadn’t been out on a date for over a year after getting dumped.
It started because Sidney had been having too many meaningless flings.
Sidney knew she was bi. Convincing Carly she was a little bit bi was easy.
Realizing their good luck when Carly started lactating, that was just destiny.
A weird and kinky destiny, but one they didn’t run from.