Bad Uncle by Jordan Silver

After an accident took the lives of his friend and his wife years ago, Solomon found himself the new guardian of the very hurt and frightened Alexandra. As unsure of himself as he was, he did a fine job raising the little angel whom he called his doll. She was sweet and even tempered and never gave him a moment’s trouble. That is until her eighteenth birthday when either the punch had been spiked or someone pulled a switch. The once obedient, well mannered child, had suddnely become a hellion with the body of a siren and the tongue of a wasp. Now he finds himself hiding out at the office to avoid going home where the temptation was getting to be too much. But there was no hiding from Alexandra. She’d made up her mind what she wanted and since she already had him wrapped around her finger, she knew it would only be a matter of time before he gives into her. After all he’s always given her what she wanted.

Bad Uncle – When Mark left the home of his adoptive parents seventeen years ago, he swore to himself that he wouldn’t be back until he could get his revenge.
Now eighteen years later he’d moved on and built a life for himself, leaving the past behind. That is until his adoptive brother’s daughter searched him out. The brother who’d made his life a living hell.
Now he’s back in his hometown at the request of his ‘niece’ and his revenge just might take another form.