Applejack and Spike love each other basically.

Applejack is a werewolf. An Ultima werewolf to be exact!

Applejack is forced by her father to marry Trenderhoof, but she doesn't want that. So to avoid doing that, she runs away and on her run she meets someone and the rest is history i guess you could say.

Applejack and Spike live their lives with their family.