My bunny died due to my family’s negligence

Over my Christmas break I went back to my home state for two weeks to visit my mother which I’ve done many times before, while I was gone my aunt and uncle (who I live with) were also out of town. My bunny was left at home to be watched by my cousin or so I thought, but the day I got on my flight my aunt and uncle had a family friend and his 10 year old twin daughters come pick up my bunny and take her to their house without even telling me and two days later she was dead. No one told me about her dying until I got home TWO WEEKS later and I was only told because I asked where my bunny was since her cage was empty. No one told me she was going to be watched by the twins, they didn’t tell me because they knew I wouldn’t be ok with it, the twins are so rough with my bunny to the point I had to ban them from even holding her after my bunny (who is fully liter trained) got so scared that she peed on one of them, which my aunt and uncle are aware of. The twins dad tried to buy my bunny off of me for his daughters and my aunt and uncle tried to pressure me into giving her away to them which I obviously said no to, I’ve had my bunny before I moved in with them and it’s not their bunny to give away. My aunt and uncle KNEW I would not be ok with the twins watching her let alone even being alone with my bunny and they let her go to their house anyways. They also let her go to the twins house KNOWING that one twin had Mano and the other had pneumonia which I’m not sure if Mano or pneumonia can be passed to bunnies but they still knew I would not be ok with that arrangement even if they twins weren’t sick. And just to top everything off, the twins dad buried MY bunny in HIS backyard so that his daughters, who had no relationship with my bunny, could visit her grave whenever they want. No one told me anything and I feel so betrayed and sad, but is anyone able to let me know what the odds are of a bunny getting Mano or pneumonia from a human is ? I believe she either got sick and died or the twins scared her to death, she was only 3 years old and a Netherland dwarf rabbit.

EDIT) Update: I don’t know how else to update but editing the post so I’m sorry if this isn’t the right way, but my bunny is confirmed dead. I saw the picture of her body, and she just looks like she’s lying down ? But she does look really stiff so I assume rigor mortis already set in by the time the dad found her so she was dead for a good few hours before she was found. But she did not look sick in the photo literally at all even being dead, she looked like she was just laying down. I don’t think she got sick I think the girls scared her to death.