I've watched all the episodes so far and didn't see her???
You must have blinked longer than 2 seconds.
She had issues with her hooves gripping the log. Rob probably forgot to put some new horseshoes on her. She should've trained harder for it instead of spending her spare time horsing around on social media.
When they showed her husband's disappointment and anger at the end, and her almost in tears; did anyone else get the notion that he was probably going to beat her when they got back home?