This same trope also ruins a lot of FemPC games. It is as if the writer couldn't imagine why the player of a porn game would want to either avoid a sex scene or just play along with one without needing some shitty excuse. They seem to think the girl needs an excuse to be slutty here, but at the same time couldn't be bothered to come up with an excuse that makes any sense.You know... I love NTR H-RPGs. They're generally a fun blend of some of my favorite fetishes, but... I am so tired of the "I've got a picture, you do what I say now" trope. It's just such lazy writing.
So many set-ups have gotten ruined by the pointless and lazy introduction of blackmail. Examples include the classic scenario of a boss sexually harassing a meek employee that secretly enjoys the attention, only for the whole thing to randomly escalate to telling the so far willing and obedient employee "suck my dick or you're fired." Or having a repairman over and intentionally leaving the bathroom door open to see what he does, only for the scene to devolve to "I took a picture of you in the shower, now you have to be my sex slave or I'll post it on the internet!"
It is like these devs think women are some fey creature. Like a leprechaun that has to tell you where his pot of gold is if you catch him, or a vampire that has to count the individual grains of salt if you spill some. If you take a lewd picture of a woman, they are mystically bound as your sex slave now, that's the rule.