Oh no... Whenever there are too many happy scenes there's always a fitting blow on its way. I do wish for Fateh to move on, but the way he suddenly morphed into a chipku husband was unpredictable. Its as you said, it might be him treating Tejo as Jasso's substitute just because he wants to prove a point
It'll all come crashing down if Jas re-enters his life demanding him back. And I think... a Fatejo breakup will definitely happen sooner or later. Cuz lets not forget, that the mangalsutra on Tejo's neck is still Jasmine's choice.
Things will never change unless Fateh initiates changing things himself.