Are we sure her motive is money? I have no idea, not being a personal acquaintance. Trying to put myself in her shoes...being married to a thrill seeker and all that goes with that, I'd have to conclude that the possibility of an early death probably goes with the territory, and as an intelligent being with the means there should have been a rather large insurance policy in place.
Big difference between 55 and 100, but I believe even at 55 that would have still been speeding. Again, trying to imagine myself in this situation...how would I feel if this was my husband, would I be motivated to sue, and if so, for what reason? If there really was a mechanical failure in the car would I want to be compensated for the life of my loved one? Would I want to protect others from meeting the same possible end? In light of the whole GM ignition issue (of which I own one of those cars), it's a possibility.
As someone who believes that personal responsibility is entirely becoming more and more a rare experience instead of the norm, I also know that I would be seriously p.o'd (like off the charts) if someone else/entity had even a smidgen of responsibility in my spouse's premature death. Look the heck out because I'm coming for you and not necessarily (and likely not) for the money, but to put you out of business. Perhaps that's what's going through her mind?