Arti should NOT tell Yash (just yet)

The reason being that none of them Are bonded yet. Yash and ANSH have staeted to bond. If yash knew that anshs father is alive, he might keep his distance to both ANSH and arti. But if come to know it later, he Will be in love in arti and be a loving father to ANSH. Then he Will fight for ANSH if Praahant ever came to claim his son ( maybe because his second wife cant have kids). In other case he just might let him go to his real father

I want yash to know before his family, but not just yet.