grammar question

Q1. What is the meaning of "was bedridden" in the following news
?
Q2. Is it right "the older man's horse-racing addiction" ? use "his father" instead of the old man是否適合？
Q3. "risked 是否用得不適當，please explain?


The court heard that on October 11, 2009, he chopped his father in the head, eyes and legs at their Ping Shek Estate apartment after a row over the older man's horse-racing addiction. When Lai arrived home, she found her husband in a pool of blood at the balcony, but she did not call police as the couple did not want the son to be arrested. Instead, Lai bought medicated oil from a Chinese medicine practitioner and rubbed it on Kwong's numerous wounds. But when the husband's condition deteriorated - he had pus in his wounds and was bedridden - Lai and her son covered Kwong with a cloth, tied him to a trolley and left him out on a street. They then called police and an ambulance for help. Paramedics, however, found him already dead. In a verbal statement to police, Lai said she should have sent her husband to hospital but was very worried that their son would get arrested. She also said they risked the Housing Department penalizing the family and disqualifying them from living in a public housing estate due to rubbish hoarded in their flat But when the husband's condition deteriorated - he had pus in his wounds and was bedridden - Lai and her son covered Kwong with a cloth, tied him to a trolley and left him out on a street.