<human>: My wife's father was a drug addict and non-violent felon.  While in prison, he was attacked and beaten (literally) almost to death.  After an extensive fight for his life, he recovered to an existence of disablity and brain damage.  During this time my wife and I had a child.  He was released from prison to his parents; his wife was unable to care for him due to her job.

My wife's father understands (barely) that he has a grandchild.  Sometimes he thinks my son is his child, but most of the time he understands that my son is his grandchild.

I don't know how to explain what's happening.  

My wife's grandparents are taking care of my wife's father.  My wife's grandparents hate my wife's mother.  

My wife's mom takes care of our son when we want to go out, and normally her huspand accompanies her.  Normally this is fine, but recently her husband's parents have been completly unreasonable. My wife's father's parents have begun to withhold his blood clolt medication if he goes with his wife. Moreover, if he doesn't accompany them to church or any famlial outing, they withold his medication to force him to go with them.  We want him to partcipate in his grandchild's life, but they continue to prevent that by withholding his medication.  

If it was my grandparents, I would stop it, but my wife is hesitant to confront her grandparents, so I'm left frustrated and incensed that their son, their disabled son, has his medication withheld because he would rather spend time with his grandson and/or daughter than his parents. 

I am so angry and frustrated at my wife's grandparents.  I don't understand how anyone could deny life saving medication to their son.  I want to stop this.  I NEED to stop this.  What should I do?!

Can you give me the gist of the text in a nutshell?
<bot>: My wife's father was beaten in prison; his parents, who hate his wife, are preventing him from taking care of his grandson with his wife by denying access to his blood clot medication.  I don't know what to do.