They can tell Abhi how shocked they were after hearing Tanu say it. They couldn't belive it so they confirmed with Sarla maa and Sarla maa blinked and said yes for everything.
Tanu will have no escape after this. Since A and T are drunk. Team can use it to their advantage and since p is also drunk Abhi cannot say P manipulated them.
How idiotic of Dadi to give Tanu a gap to escape. She should be cornered through all ways. Dint they see her escape in the past using her lies?