BhabiMa also knew Shiva was going to propose when she came to the terrace to call them both of the party.
Now BhabiMa knows Raavi loves him and planned a surprise.
After Raavi leaves if BhabiMa tells SHiva what she knew about Raavi's surprise, hope he believes her and not asks her for proof.
"Bhabi, aapko saabit karna hoga, Raavi mujhe pyaar karti hai, aur mere liye hi ye sab decorations/ surprise plan kiya"
At the rate he is going, I won't be surprised he will ask proof from BhabiMa as well😕
Na he won't ask proof from pujaniya bhaabi ma. Bhaabi ne bola Raavi pyaar karti hain toh karti hain. That is why they made Dhara see the decorations. She will tell Shiva that Raavi loves him and planned to confess. Bhaabi has to get involved in their life somehow