Hate me to the Moon

The last thing Harry wanted was to spend his entire summer stuck with his dad's new fiancée and her kids. He wants no more when he learns she's a very religious dictator, raising a sixteen year old nun and a clean cut potential priest ass kisser.

Everything takes a slightly different turn, however, when Harry finds out his future step-brother is actually the rude stranger he caught sucking off a guy in a pub, far from the reserved Christian his mom thinks he is...

AU where Harry is a sexy nerd, Louis is a great actor, and they both pretend to hate each other's guts to convince themselves they're not feeling things future step-brothers shouldn't feel...