First post, but likely to be a long one.
Hope that no one is too shocked by what follows.
Firstly, hopefully the OP and her partner will have found a mutually satisfying solution to their problem.
Some time ago, a widow, after more than 50 years of marriage (not a family member) said "Sex is important in a marriage. If the sex is good, the marriage is good"
Personally, it saddens me to learn that so many couples give up in their 50s and 60s.
For what my advice is worth.
There is no age at which you have to stop, go on as long as you are both happy so to do.
Also, there is no normal frequency. All couples vary, even from time to time. Stress, health, emotions, diet, exercise, all have an effect.
Sex is good for you, mentally and physically, in so many ways. (not least that it slows the onset of Alzheimers)
It is wonderful bonding agent, that helps you to care for each other..
If there are any problems, talk about them. Tell what you like and even your fantasies. Do not be shy! Do not give up,
Nine pm on Friday night in the bedroom with the lights out is not the only time and place. Make it fun! You are both supposed to give and experience pleasure
Try different times, rooms, positions.
Do "naughty" things in different places, but don't get locked up for offending public decency!
If there are disabilities, find means of overcoming them.
You have hands, and lips. Put them to good use.
There are worse ways of spending an afternoon, before taking a nap
There are good books around, if you feel the need for guidance or ideas.
Try to turn each other on. Fortunately, DW and I both share her liking of pretty, lacy undies.
DW and I have been married for well over 50 years, and we still make love regularly, some might say frequently.
DW has health conditions, which I am spared, but we are blessed with fairly good health
The sum of our ages comes to 160! So our repertoire has diminished a little, but we still enjoy it.
Hope that this helps.
To think that London, or anywhere else for that matter, does not belong to any one demographic
Son’s girlfriend diagnosed with BPD