My wife is in chronic pain. 3 or 4 times a day we watch her have a screaming episode. How long before she has to go to the nursing home?

She's lost most of her mobility, and has issues with feeding herself. She can't go to the bathroom unassisted. She can't consistently take the two steps to the wheelchair from the bed, or the toilet, etc. She takes part in a program that gives us 6 hours of assistance, 5 days a week. By being in the program, she's categorized as being to the point of being in permanent care. We have two sons, age 14 and 11. My goal has always been to keep her in the home until both the kids have graduated high school, but I'm not sure we're going to make it. She adamantly does not want to go to a nursing home, but I'm not sure how much longer we can hold out. I don't have any friends outside of the family, and 3 or 4 work friends, and everyone who's aware has no advice. Thanks.