I'm surprised to see A Town Uncovered mentioned, not because I don't think it deservers the mention but because usually people only remeber the mom-dad scene and nobody likes that
In Milfy City you have at least 2 dates with the mother, they even plan to spend an entire weekend together just to have sex for the first time. In Dream of Desire you don't get to date her but you spend some moments with her when it looks like a date and in some scenes close to the end I really felt that bf-gf relationship.