Vasu's wrongful suspicions about Anmol are actually true in the case of Sakshi, but she is totally deluded about the true nature of both these people.
She resents the remarriage of her widowed daughter-in-law, but actively promotes the remarriage of her widowed son. She does not concede that Tammy needed a father, but she herself emphasises Khushi's need for a new mother.
Vasu refused to accept Ragini's wedding with Anmol after Ranbir's death. She also accused Anmol of being a crook who wanted to steal the Rajvansh family's wealth.
On the other hand, Vasu has no qualms about getting Alekh remarried after Sadhna's demise. She has also refused to believe the evidence that Sakshi is cheating the Rajvansh clan.