Pragya needs abhi's property because

2.Tanu wants to be with abhi only for his properties and reputation. If pragya take over the property and house, abhi will obviously become poor. So tanu will automatically leave abhi and goes to nikhil saying that he is her child's father.

Two in one profit.😊

I think to make tanu and aliyah believe, she is behaving rude to abhi

Or both abhi and pragya are acting, to make all culprits accept their path of crime.