After several tries at spicing things up for his wife (including bending Billie over their kitchen island one morning, breaking into a stranger’s yard and getting busy in their pool, and attending an increasingly disastrous suburban sex party), Cooper is faced with the aftermath of his behavior at said sex party, where he tried to make Billie have sex in front of everyone.
But, Devon also used it as leverage against Cooper to try and force him to support a business deal he wanted approved.
Billie left the room, and was propositioned by Devon, who became insistent that since their partners were doing sex stuff, they should too.
When she refused and finally stepped away, Cooper then allowed his friend Devon’s (Jonathan Sadowski) wife, Trina (Amber Goldfarb), to give him a blow job in front of the assembly, as Billie stood by, crying.