Sad news there friend, sorry to hear it. Same happened to a close friend of mine whilst he and the missus were out for a steady ride out one nice evening when a drunk driver hit him and my mate lost his loved one. The car driver swopped seats with his missus to make out she was driving because he was intoxicated and also driving whilst disqualified but owned up the next day, he got 4 months :-(
Really sorry to hear about this its horrendous losing someone you love the most to the thing you love doing the most! Thoughts with her boyfriend and her family.
So sorry to hear this, really really sad news for all concerned. I lost a good friend of mine 2 weeks ago while he was out on his bike. It is the grieving and realism of loss that follows that is so sad, the families and friends that are left to deal with the tragedy. My thoughts and feelings go out to all.