So my theory is that Kalyani has been in touch with Kaka. And Kaka has been pretending to be on Meenakshi's side so he can slip info to Kalyani. I'm sure he's warned her that Meenakshi is keeping a close eye on Malhar and Anu, so she couldn't take their help.
I feel Param is either someone she knows from the past or someone she may have been on the run. High chances he's a police officer and she took his help.
I m further adding to Ur theory As U said ki Meenu Amma Anu n Mallu pe nazar Rakh rahi thi usake vajah se Woh usako contact Nahi Kar sakati thi...so purane usake under Kam karane wale ins n lady police ko leke plan banaya.