I am fond of it. But introducing it somewhere other than the ending of the story feels like a not-good idea.It should come eventually if not already hinted in the content available. The scope of it however depends on how far the dev want to take this and most likely will be epilogue/ending only.
Dev said the kink is not something he is generally fond of (fair enough) but will/should happen down the line. Looking forward to it.
It will happen at the final ending of the game. For me, it's something of a final step in NTR stories. It can only happen once, and it has to be bombastic (impregnation sequence and all). What I added to the current Kendo Ending was just a tease of that.
But I'm not planning to make a full pregnancy arc. Don't have it in me.