I think any relationship can be a good one, and worth pursuing. Certainly I would go carefully, and investigate those feelings you have toward her, and how you've reacted in the past. I have every reason to believe that you either delayed and/or transferred some of your pent up feelings about your mother's death, into the relationship with Laura. Please go carefully.

We all mourn the loss of someone dear. We don't all mourn the same way, or at the same time-period...but eventually, we do mourn.