Seeking Mother teaches daughter about sex

[Den187]

Looking for games (preferably non Japanese) where mother do sex lessons and show daughter how to have sex.
Hot Sand of Antarctica

 

[Pretentious Goblin]

GGGB has a mom/daughter threesome FFM route although it's not a lesson or anything.

 

[Hunkker]

Kyonyuu Princess Saimin has that at the beginning. The visual novel is in Japanese though, you can find some videos of it translated or just watch the subtitled OVA.