http://www.getchu.com/soft.phtml?id=608885
Girl in pic 4 is sister in law of hero.
Blue haired girl in pic 31+ is sister of hero.
Guy with beard in pic 39 is the father of the hero and the girl with blue hair.
Ergo, the girl does it with both her father and brother.
Girl in 177 is the wife of the hero, she also does the hero's father.

Base +2, Comrade Claus +7

The guy with the beard is the hero

Base +2

415 ev png

(18禁ゲームCG) [090410] [ALL-TiME] 息子の嫁は親父の女（オレノモノ） -女医とナースに仕込む胤-

Base +6

P.4 woman is sister of P.117 woman, want to be writer but not really good, parents nag too much so she stay with her sister family.
P.31 is daughter of the hero, she is sister in law of P.117 woman (her brother marriage p.117 woman), new nurse.
P.117. is daughter in law of the hero, marriage hero's son. Obstetrics and gynecologist.
P.289 Half Jp half Russ. Anesthesiologist.
P.360 female nurse.

Hero is the director of a hospital, obstetrician.

This has father-daughter fucks to created child, sister-brother fucks, father-in-law steal son's wife to create child, boss fucks employee to create child.

Base +8