Hello. I`m new in simming with sims2 but I am learning fast

Still i have a problem with family sims to keep them faithful and stop flirting with others.
Is it possible to make mod which makes sims(married,engaged or even `go steady`) faithful to their partners only.
The One - eternal love mod maybe.
Thank You.
I`m UC user -all EPs and SP( sometimes 2 unofficialEPs) with partial use of inteen (or inteen mods).
Peace and love to all simmers here.