In both cases you dress the woman up in a cow costume and fuck them with the express purpose of increasing their milk production. In Summertime Saga you do this while she's attached to a milking apparatus, in Max's Life you do this on a plot of farmland you're gifted, iirc. The entire point of the game isn't farming the women, no, but with those two characters, that's exactly how they're treated.
I don't know if Farmer's Dreams has women to milk, but the game is essentially Harvest Moon with porn, from what the description says, and the writer for it is the same as the writer for Babysitter, which means it should be good.