Identify Looking for an old visual novel.

[Harem Route]

At least 2006, possibly older. The girls are, I believe, a mother and 2 daughters (although I'm not certain).
You were, I think, training them, iirc. The choices came in the form of a screen with all of them, where you could choose actions in order from oral to BDSM, to progress the story. You could focus on one of them, 2 or all 3 for different variations and endings.

Couldn't give you more information, it was basically the first VN I've ever played and I would like to find it again xD

 

[scrumbles]

Did you train them to do what, exactly? Just sex or other stuff too? Was it a western or a Japanese game?
A quite old trainer is A Maid's Story, but I suppose it isn't what you're looking for, the three girls are not related.

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[Harem Route]

Japanese game, and no, it wasn't that deep of a trainer. Just the sexual stuff. Oral, vaginal, anal, bdsm, something like that... if you focused on multiple girls, group options unlocked as well.

And while it's not what I'm looking for, I like training games and haven't seen this one, so thank you =)

 

[crud78]

Check out the Asenheim Project - they keep all kind of old school VNs alive there:

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[Harem Route]

These look like fun, but I'd say they are older than the game I'm looking for =)