Some points to ponder
1 Mamta had noticed Ritwik being close to a girl during Sangeet
2 she knew palak was the girl who had been with Ritwik in Jaipur
3 gold digger accusation between Ritwik to palak
4 Rohit coming and clearing it in front of Mamta
5 Reeva telling her doubts again and again to Mamta
6 kidnaping .. maybe she knows more than it appears
7 she pushed Ritwik to get married to ananya forcefully knowing he was not inclined
8 she can sense his disinterest
9 she has seen Ritwik Palak interacting
Maybe she's creating a situation where Ritwik rebels like sasamrc
Situation becomes bad and VP disinherit him
Inspite of rishab being older VP made Ritwik the ceremonial head
She's doing it so that Ricky gets thrown from the hous
This is a very very Ekta scenario something we see in most of her soaps
I hope this is not the case here