This event is fairly complex, but straight forward if NTR is off. I’ll explain NTR off first:
If the PC is in a relationship with Wifey, NTR off: PC can use "L" word and have a Valentine's Day event.
If the PC is not in relationship with Wifey, NTR off: Not much happens. Yup, that’s what friends are for.
If the PC is in a relationship with Wifey, NTR On Mr. Davis will react to the choices you’ve made in the Snoop scene before Wifey comes home. If you don’t want to see something intense, just pick “Wifey seems uncomfortable”.

If the PC is not in a relationship with Wifey, NTR On: Same Snoop scene, but no intimacy with Wifey afterwards.
Other changes:
Added an extra option in Katie's path to force Wifey to not go on a date with Jamal if the player has already chosen to share Wifey, but changed his mind last minute.