I agree with kriyadiwani that the truth should have been disclosed during the ME.
K would have been devastated, P would calm him down. The thakurs would accuse her of doing black magic and causing K to become infertile. A massive row, and K would say enough's enough, and kriya would leave TN, initially book into a swanky hotel, bubble bath, candlelight etc😉
Then they'd get a second opinion, some more thorough tests, and the doc would be able to cure his problem.
Then they'd find a flat to rent, but SS would create problems, try to split them up again.
P would become pregnant, and K vows never to let his family anywhere near the twins😊
Naiki would get caught red handed with radhe, who'd blurt out the truth about her past, so she'd get kicked out.
Kesar would recover, and return to TN with a handsome doctor who's fallen for her, and demand they give samar to her, they'd flip, she'd start divorce and custody proceedings, with her hottie doctor supporting her.
KN would keep having women over at night, till he caught a nasty disease😈
Arushi would have a lesbian affair with that new colleague of hers, there's a new social message😆
Tanmay would run into naiki and they'd have an illicit affair and plan their revenge on the thakurs and saxes.
Adarsh's gf would dump him and he'd have to grovel to komal who, in the meantime, gets an education and tells him where to go.