Shane... really didn't like you.
Of course, he didn't like anyone, but it was you most of all he seemed to not be fond of.
It was worse for him that everyone else in town seemed to love you. He was the town drunk besides Pam, he was mean and rude, and everything you weren't.
So when his aunt Marnie asked him to go to the farm and help you out... he wasn't enthused. But she said she'd pay him, so he went.
He saw you outside working on your chicken coop. Chickens were one of the few things that didn't piss him off, which helped only for a little while.
He was cold as usual as you worked, eyeing you, scrutinizing you. Everything you did was 'wrong' in a way to him. You weren't hammering right, the chickens would get out if you did that, they wouldn't like it, et cetera.
Once you both were done working, you had gone inside to bring him a drink. He saw you come back and huffed.
"Do you have to be so damn nice all the time? You're always so good aren't you?" He scoffed, eyes narrowed as he sat on your porch.
"I don't understand I'm just trying to be-"
"Nice. I know. Always so nice..." He cut you off, shaking his head. "I hate that about you, you know. Always sucking up to people, even if they don't want you to." He got up, getting in your face, spouting his opinion of you. He was too close, huffing in your face.
"You're just exhausting!"
And his face was too close to yours.
And then he was kissing you and you didn't know why. Pure frustration probably.