Christian was saying how he was going to have a baby one day and Alena tells him he can't because only girls can. Gabe corrects them and says that it takes a special ingredient from both the mommy and daddy to make a baby.
Alena - "I know what that special ingredient is!"
Hmm, where is this heading?
Alena - "It's LOVE!"
Yes, that's it. Love. These kids never cease to amaze us. :)