Even if they owned their home, as long as a partner (spouse, etc) is living there, then the home is not assessed for care home fees.
AFAIK the spouse's assets are also not included in the assessment.
However, I would suggest you contact Age Concern on their free advice line:
0800 678 1602. Lines are open 8am-7pm.
Alternatively contact your local Citizens Advice Bureau, but their lines tend to be very busy so Age Concern would be a better bet.