More and more often, I found Teresa and Pammy on the couch together. Sometimes they were at opposite ends and sometimes they were cuddling together, talking - or Pammy was lying with her head on my wife's lap - as Teresa played with her hair and the two of them chatted.

Teresa hadn't asked to join us for sex after that first time - and Pammy hadn't found an excuse to bribe her into it - but I was kind of hoping we'd get a chance to do it again.

A week later, a delivery truck was leaving the house when I arrived home from work. Pammy was at the...