Some suggestions for Sam Tail's consideration and use if so inclined:
Clothing:
Chasity belt.
Occupies panties slot.
Prevents genital penetration & masturbation.
Requires a key to remove.
Rope Outfit (think shibari).
Occupies bra and panties slots.
Fetish clothing, Does not really cover anything.
Brest bindings
Occupies bra slot
Reduces the apparent size of breasts when worn.
Pregnancy:
Sterility.
Character cannot get pregnant without artificial assistance - a fertility pill for example.
General:
Clear indications of what changes when a given action is performed.
More character customization options, even if it allows some strange looking combinations - Breast size (flat to larger), Height (Taller & shorter), Hair color, Hair length (Shorter and longer), Quantity of pubic hair (Shaved to Mature), Option to cross dress (need to sneak into a male only area for something or trick a female NPC as some examples of use), etc ... I think you get the idea.
Still a ways of the often mythical version 1.0 so feel free to use them as provided or change them to suit whatever you have in mind.