Original Title: 異妻母淫-いなづまぼいん-
Romaji: Inazuma Boin
Release Date: 2010-01-18
Company, Producer: Hachinoko no Sato (はちのこの里)
Developer product page: http://hachinokonosato.com/products/inaduma/index.html
VNDB link: http://vndb.org/v11455
I've looked in a lot of places, could only find outdated...