Full House by K.L. Ramsey

Rainey Nolan had to learn to live with disappointment after her husband was killed while serving his country, leaving her to raise four kids on her own. She learned to be the best mom she could be to her son and three daughters, but that left little time for her to have any fun. Rainey’s idea of a good time was tucking her kids in a little early to watch a television show and fall asleep on the couch. That all changed when her sister showed up to her house with her rich new boyfriend, his security detail, and a whole lot of trouble.
Slater Tyson was the head of security for Knox Heart and both of his casinos. He was ex-military and damn good at keeping people safe—that included single mom, Rainey Nolan, and her four adorable kids. Slater was old enough to be Rainey’s father. Hell, his own kid was about her age, but that didn’t stop him from wanting to ask her out on a real date. He wanted to treat her the way she deserved to be treated, even if that meant asking his boss’s new sister-in-law out. Screwing things up with her could lose him his job, but he had a feeling that Rainey Nolan was worth it.