Draco Family Duet by Emma Nichols

Melt Me, Draco Family Duet: Book One
After hundreds of years on his own, billionaire bachelor Blaise Draco had given up on finding his mate and turned his attention to growing the computer side of the security business. When he arrived at the Silicon Valley Expo, Blaise already expected to fight off unwanted female attention, but meeting the one woman who was immune to his charms had him intrigued. Luckily, she needed his help and he had his in.
Ever since her mother’s death, Maggie Wallace had cared for her father, keeping him focused and fed. The whole of her plans revolved around helping her father negotiate a sale for his software program. Instead, some arrogant rich guy came along and dashed their last hope.
He was living the fairy tale. She had given up her dreams. Together they might just build a future.

Shield Me, Draco Family Duet: Book Two
One reluctant witch. One lonely dragon. One man intent on settling a thousand year old vendetta.
As the head of Draco Security, Mishal was used to working for important clients. This time he’s sent to an event in Asheville, to meet Peri, who he hasn’t seen since she was a child. Now she’s all grown up and needs his help.
While working for Draco Investments, Peri discovered the dragons were being killed off. Before she could find the murderer, she was implicated in a crime and battling feelings for Mishal. He’d love to claim her, but first he must shield her from harm and finish a fight started long before any of them were born.