I wrote a walkthrough for the mom. The only other character that would need one is the ghost but I've not written a walkthrough for her. I'm not sure what point you're at in her story, but it's a short route and goes like this:
- Overcome fear by taking two shots of scotch in the evening (scotch is in the kitchen on the shelf).
- Meet ghost, give her a gift (a colorful, fragrant one) to gain her trust.
- Talk to her for a bit to discover her problem.
- Give her something that will show her the truth.
- Come back in a few days after she's done processing.
- Keep checking the house at night (Night or Midnight) for her to return.
- When she returns, give her a more intimate gift (she likes jewelry)
- Talk to her some more.
- Use the "Benefit" you unlocked when she flashed you. (should result in animated "reward" scene with her)
I hope that is helpful. Cheers!