I was accused of ordering the removal of the feeding tube of my mother-in-law.?

My 94 yrs.old mother-in-law had a major stroke. She was already given a morphine drip for at least 10+ hours and was in a "dying process." My brother-in-laws all came up and accused me of telling the doctor to take out the feeding tube from her nose. The doctor never asked me, she had mentioned on the previous day that it should be done because her body had already shut down and she didn't need any more fluid in her body. She was barely breathing, and she would die within 24 hours. My husband actually swung at them because he was present when the doctor asked his older brother. They said if I didn't tell the doctor, she would be alive and they can move her to hospice care and she can stay longer with them. This angered my husband and I so much, now my husband won't go to his Mom's funeral because he fears he will lose his temper during the ceremony. I'm so angry I can barely function or sleep. It hurts deeply because we've always taken care of her. Most of our activities evolves around her even when she's in the nursing home. We'd visit her almost every other month or whenever the kids have more than 2 days weekend. I wrote emails explaining to them but they refused to read it. They still say it's my fault that she died. Can I sue them for wrongly accusing me because now everyone in his family is mad with me, and refuses to talk to us. I want to clear myself because it's unfair for them to listen to one person and accused me for something I didn't do.