I have also finished that, pretty decent sprite animation and scene art. Though to disappoint, not many japanese visual novels get animated scenes so you might have to stick to fapping to still images. Though i do have my fair share of animated selections too
Right off the bat, check out Atelier Sakura works for NTR, can check out Oyako Ai and sweet honey family for DILF. Cant help you with blackmail, but you can try some bishop works. Links as attached below.
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Sweet Honey Family - Musume to Tsuma ni Amai wa Chichi no Narahi (Milf + D choice)
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Oyako Ai ~Ikenai Kozukuri 2~ (F & D incest, old but gold)
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Kazoku ~Haha to Shimai no Kyousei~ (Incest, large number of scenes.)
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Tomodachi Sex: Kareshi ni Naisho de Dousei Seikatsu! (English , kirikiri engine, meaning playable on android w almost 0 lag.)