Dirty Distractions by Taryn Quinn

As a mechanic, Brad’s good with his hands. And he wants to put them all over Sara.
Sara might be a doctor who works with birds, but Brad’s the one who knows how to find all the right spots to make her purr. She wouldn’t mind that, if only she wasn’t ten years plus—mumble, mumble—older than him.
And if he wasn’t her best friend’s brother. Her younger brother.
Brad doesn’t care about their ages or the differences in the worlds they come from. They’re roommates, living together while Sara’s apartment is being renovated.

But they aren’t living alone. Brad’s big sister lives there too. And Sara’s pretty sure her bestie would prefer not to hear Sara having a screaming O with her brother.
Or a few dozen of them.
Then again, maybe rules are meant to be broken. And perhaps opposites attract—and age differences don’t matter nearly as much as other numbers.
Like how many days it takes to fall in love.