Did he actually do that ??? Gave all the credit to mini? And what about Bon? I remember watching a sneak peek that she even fell unconscious because of not drinking water in order to keep the promise she made to ani!!
He told Mini that it was possible because Mini supported him when no one was in his support when she asked how Bondita's problem was gone. And got back to his zimmedari jaap when he himself accepted Bondita as his wife in front of Sumati when she was trying to take Bondita away with her. And makers did not give any pov of him regarding this sudden change.
During the bedwetting track, Anirudh clearly said that this challenge was more than victory or lose for him, he wanted to cure Bondita so that she wouldn't have to get embarrassed anymore. But this sudden flip without any pov made it appear like curing Bondita was important for Anirudh because he wanted to win the challenge which I believe wasn't the case.
U can watch episode 64 & 65 to get more clear view, Nima.