In Diya Aur Baati Hum, all we knew was either Sandhya (Deepika Singh)-Sooraj's (Anas Rashid) other son (twin) Vansh went missing or was dead. But with the recent episode, we get to know that Vansh was alive and was with Ankur and Ankita.
It is also revealed that Ankur broke all ties with his sister Sandhya just for the sake of their adopted son Vansh. Ankur was annoyed with Sandhya and Bhabho's protective attitude. Since though they gave one of their twin child - Vansh to the couple, they were very much attached to him. Ankur-Ankita didn't have any privacy to spend time with Vansh as Bhabho would knock their door anytime to see Vansh or even blame the couple of not taking good care of her grandson.
When Ved and Vansh were kidnapped, Sandhya could only save her son Ved as the kidnapper fell in ditch with her other son Vansh. This didn't go well with Ankur as he thought, Sandhya didn't save him as she had given her son to Ankur. Later, when they got to know Vansh was alive, Ankur took the child away and broke all ties with his sister and Raati family.
Now that Ved had demanded to join new school, where Vansh also studies, Sandhya comes across Ankita and Ankur. They confronts each other and Ankur again speaks harsh words to Sandhya indirectly that hurts her.
While Sandhya and Sooraj promise each other to hide this matter with Bhabho and Babasa, they seem to be happy to see their other son grown up with good ‘sanskar'. On the other hand, Ankur asks Ankita to make sure that Vansh doesn't step into Hanuman Gali, where Raati family stays.