Yeah, definitely lots of potential for lewds there XD
Would you make special versions of the chastity for the futanari and hermaphrodite and maybe idea for marin route have her lock Lust in a special chastity cage/belt with tentacle inside them(kinda similar to meat parasite when they attached to your crotch) or even make the cage/belt sentient so you have to please the chastity cage/belt to take them off (basically recycling the tentacle bra and panties)