Hi BJ,
Don't be sorry ... as this is a very complex issue. That is Mixed Aged Couples and whether they can stay on ESA and Housing Benefit or have to claim UC when one partner hits State Pension age.
Have a look at the guide here
www.housingsystems.co.uk/Portals/0/Docum...AVEm8eg3qY5Hqg%3D%3D on Mixed Age Couples and Benefits.
If you find the guide confusing it would be best to get guidance from a local Benefits Advice Centre.
David