There's no motive. She's dating Ranveer and Harsh is Ranveers cousin lol... I expect her to support him. Plus there are some similarities with Ranveer and Harsh, they even sound the same
Felt the same ---- Both have uncanny similarity with their voices ---- & they both look like to have not showered for days --- thus Dipla having *hots* for him --- 😉*😛*