Donna Jo says: "If you like to see girls naked, why have you never asked me? I have no objection."
That's actually a good idea.

What will have to be included is the usual dad-struggling-with-bathing-the-baby routine. The twist on this would be that Lisa (daughter #2) also wants her new daddy to bathe her. Considering that's she's too big for the kitchen sink, he offers to take her in the shower with him. She loves the idea. Soon, showering with daddy is a normal routine.

Since children don't live in a vacuum, friends will have to be introduced into the cast. Donna Jo's bestie is Tina from across the street. She's cute, smart alecy, and throws in allot of innuendo. Every time Tina comes over, daddy Jack seems to recognize her. Eventually he figures out that he has seen her naked on his computer. It gets interesting when he asks to see her naked. She responds by telling him that her dad would love to see Donna Jo naked. Tina's dad has a child modeling site. Future episodes can be derived from this.

Any other ideas?