ehm.. the mother isn't dead, she's in hospital as of v0.11
didn't you find this scene?
go in the room with the open door
The last two comments before yours were both by Catwashere, and the top one mentioned he/she only started playing the game today. So I suppose he/she simply hasn't reached day 10 yet (or they have and simply didn't like Lisa enough even give going to the hospital a try and just went on the date only).
But I don't think Catwashere even reached day 8 yet, because that one sort of shows why Evelyn (older sister/main character) doesn't like Frank that much. I know it's still a bit vague, even after the dream-memory... but it at least shows Evelyn isn't complete innocent in what happened between them/it isn't all Frank's fault. Also... why do so many people think he did something bad to Sophie (younger sister)? Maybe I failed in this, but... I tried to make it clear the Sophie doesn't have a bad opinion of her father at all and that Evelyn knowns the image she has of her father might be colored a bit by what happend between them. All I can say is that he might not be the villain you think he his.
And for those who honestly don't want Frank to ever be introduced into the story... Well, what can I tell you? Do you honestly think a character that has been set up so much from day 1 is really never going to appear in the present day?