"Y'see, she represents the fears of maturity and growing up. So we gave her a Hawt milf body."

"Okay, neat use of the design for the concept. But why is she also a demon-spider?"

"…. Spiders are also hot…"

Then you just give her the mannerisms of Him, and the sexy as fuck man-voice and you're good to go.

I feel the last part is on the same category as Dr. Girlfriend from Venture Bros.