Well ... that was ... something.
First off, I appreciate that there is an option to play in English. Very low on the Engrish-scale as well. But it would have been nice to be able to choose that option without clicking on random Russian buttons to find the option.
There are a lot of choices in this, given the length of it. A lot. And it's not clear what effect many of the choices have on the story. The awkward wording of a lot of the choices doesn't help. As far as I can tell, the only sex scenes are dreams featuring short, store-bought animations that are extremely fast. I can't tell if the dev's machine is just underpowered, but the animations feel like you're running a 100-metre sprint. So I tried playing nice. Weird ending. I tried playing mean. Same weird ending. Some choices only change the dialogue for a single screen.
Technically, I guess the game is okay. But without knowing exactly what the point of it is (since you never seem to actually get with the sister except in dreams) it just feels like an exercise in broken family dynamics. Not fun.
Oh, and what's with the "Family Secrets Sweet Mommy" folder name ... ?