How can they be happy for Ovi?

Do they honestly think she will have a happily married life? The guy she married is in love with another girl. He will go back to being workaholic arjun. in fact, at least before he cared about ovi as a friend. But now arjun might hate her because ovi emotionally blackmailed purvi into doing this. How can savita and manav knowing this accept the marriage. forget purvi and arjun pain, do they honestl think ovi will be happy in this marriage in the long term even if she is happy now?