YOU WON'T BELIEVE: Sister Wives' Janelle & Christine SET TO SPILL SECRETS in EXPLOSIVE NEW SPIN-OFF!

Janelle and Christine have been on "Sister Wives" for 17 seasons, but they're ready for a new adventure. The new show, which is still in development, will feature the two reality stars alongside new family members. According to a source for The Sun, the executives of TV personality Kody Brown are set to star in the upcoming show, and more family members will join the cast.