The only few times, were to help speak on behalf of Wendy Clarke.
Each time, Cindy Clarke would be very upset.
Besides that, he never really had any conflicts with Cindy.
Though, Joshua Clarke did have some issues with Cindy too.
Ever since he arrived in Belfard, Cindy didn't welcome him.
She always treated him poorly.
Joshua Clarke thought that even if he hadn't defended Wendy, Cindy would just be the same towards him.
Indeed as Christy Xenos said, they both are his daughters, he can't possibly not help Wendy when she's in trouble.
Cindy holding a grudge over this, that's really unfair.
As Joshua Clarke was thinking over it, he then hears Wendy say: "Dad, about this, I have to say something."
"You've always treated Cindy better than me. Despite this, I never held a grudge against you, I've always been filial. Why is it when it comes to Cindy, you only helped me say a few words, and she gets upset?"