A “walk in the park” is an idiom. It means easy, relaxing or non-taxing. Following this it may mean just the opposite. Cherry Torn was enjoying her hike. It was a beautiful day and the seclusion was nice. But being miles away from culture means miles away from assistance. There are predators in the wild, also one has Cherry within their sights.
There is not any way she’s outrunning this stranger in pursuit as Cherry is as far. She is able to run as her life is dependent upon it, he needs a bit of her and he’s going to receive it.
Struggling simply makes the situation worse. He has Cherry tied up and vulnerable in the middle of nowhere. Like this could be embarrassing to tolerate she wants to scream for help but being seen. She is being whipped into submission and made to suck cock. The only fear she’s left is that somebody will see her abasement.