I don't think Devi will ever ask Anokhi to marry Shaurya. She is doing the mistake of trusting Shagun with Shaurya not knowing how dangerous she is. It is similar to the mistake Aastha did of trusting Devi with Shaurya not knowing how insecure and manipulative she could be.
Though if she finds Aastha supporting Shakhi and as a result Shaurya softening towards her, she could agree to Shakhi marriage to gain some points with Shaurya. Later she will try to manipulate Shaurya against Anokhi like the typical itv saas. 😆
I still think Devi softening towards Aastha was just an act. I can't forget the shoulder nudge she gave Aastha to make her turn and see how deeply Devi cared for Shaurya. Aastha let go off Shaurya so easily because she thought Devi actually cared for Shaurya as a mother. So she had to maintain that facade to reassure Aastha. Even after Shaurya returned to hotel after the kidnap fiasco, Devi came and pushed Aastha to make place for herself by Shaurya's side.
Devi's redemption will definitely come, but perhaps when the show will be nearing its end. Till then she will keep planning and plotting and it is all for the good. She makes for an entertaining villain.