Thanks to Anonymous for his / her / their comments / questions in response to part 1 of this story. As I promised I have got the narrator (George) and his wife (Glenda) to answer the questions. See the 'Why Stay Married?' section.
THE STORY CONTINUES
I told my wife what the doctor had said, that he had signed me off for a month and he had referred me to a psychiatrist.
Without any preamble, Glenda said "George, we should continue meeting Dave."
I thought this was typical of my wife. She wanted to fuck Dave. My breakdown was a mere inconvenience to her.
I didn't reply so she said "Dave was so kind to you."
I said "That's true. He delayed us having a fully sexual 3some. Okay, but I don't want either of us to have sex with him until my medication kicks in."
Glenda said "Okay. I'm sure Dave will agree, given your circumstance."
I had been railroaded into agreeing for Glenda and I to keep seeing Dave, who I still didn't like or trust.
Glenda also implied that, if Dave didn't agree to a pause, she would let him use her body.
NUDE 3 IN A BED
Glenda reverted to being uninterested in everything, except seeing Dave. Admittedly the meds I was on inhibited my libido. But if Glenda had initiated I'm sure my cock could have risen to the occasion.
Dave came over the next night. This was his first time in our house.
We agreed to recreate the 3 in the bed scene but this time both Dave and would be naked and Glenda would wear her panties.
Dave and I helped Glenda strip down to her panties. Dave admired my wife's tits but didn't touch them.
Dave started undressing. This was the first time that my wife would see his monster cock. She watched intently as he took off his clothes.
When he pulled off his designer underpants she said "That's what I call a cock. I can't wait to see it fully erect."
I then stripped naked. I enjoyed Dave and Glenda watching me undress.
As before Glenda kissed Dave and then me. This time Dave's cock was getting longer and thicker. Dave then kissed me and I kissed my wife.
When the 3 of us retired to bed Dave mounted my wife but she still had on her panties. He had an orgasm while dry humping her and stained Glenda's panties with his cum.
He went to the bathroom to clean his cock. Then he dressed, kissed us both and left.
WHY STAY MARRIED?
After Dave left I said to Glenda "I'm replaceable and divorce is easy since we have no kids and we own next to nothing. Why do you need me if Dave ticks all your boxes? He appears to have lots of money while I earn only a modest salary.
I couldn't afford give a taxi driver £20 and tell him to keep the change.
And his dick is extraordinarily large. It's twice the size of mine."
Glenda replied "Dave is a sleep-around who fucks both women and men. I'm not in love with him, but even if I fell in love with him I wouldn't want to marry him.
He wouldn't stay true to me. I'd just be one of his cum dumps. Some women might accept that. I couldn't and wouldn't. That's too way out for me.
And besides you helped me select him, no doubt for his large cock size."
I said "If Dave doesn't suit you then finding guys to fuck wouldn't be a problem. You have been propositioned on Bull.com by lots of men and narrowed it down to 3."
Then came the clincher.
I asked "So why do you stay with me when I am nothing more than your roommate?"
At last I had said that I felt like a roommate.