1. Their scenes are usually boring.
2. In their 1st scene itself, Samar told Bani aunty and even now though he knows Bani, he will think she is Thapki when she will be acting as Thapki. He cannot even differentiate between them. In future he might even consider Thapki as Bani.
3.Bani wants to take revenge from Thapki and not Tina. By marrying Samar, she will cause more sorrow to Tina than Thapki.