I hope Nene and each npcs have different reaction(also different illustration..? Not a pressure) depend on size of their penis
1. Npc get surprised by nene's size during sex
Or
2. Nene get surprised by size of npc's penis during sex or rape(in battle)
+
If it's possible, different result(cum, illustration) depend on size of nene's egg(ball)
Not a pressure but many detailed root of result will be a strong motive to play long time for player
(Detail=different sex scenes for same character depend on status of nene)