Lisa/Bernard route:
Spend time with Wifey again to move on to the next event. She will bring a client home, not knowing that the PC is home.
The PC can choose to snoop, confront, or ignore.
If the PC snoops (can do this as PDC), he will be caught at the end of the event. Being USF keeps the PC hidden. Wifey will continue lying to the PC on the hard NTR route in this case.

The PC and Wifey will have a discussion afterwards, based on the route and stats. (Too complicated to explain all the variants, test it out with your own playthrough)

Ignoring or Snooping as USF keeps Wifey in the dark. She will still think the PC is oblivious.