You will need to talk to Bernard about it when you guys started sleeping with each other, then you get 3 improvements to pick. Pick the fair option
How do I get hearts with Bernard?
Go to the cottage every Friday and when u have enough "like points" u have to sleep on the bed.
Srry, I don't remember
But, there's some help in the game guide.
Thanks for the help,it worked!
I did try to find him there on a Friday before,and Bernard did not show up, then I kinda gave up,thinking that the cottage scene was a one-time event~