Unicorn’s Instinct by Elva Birch

All that Tara wants is for her mommy to be happy. (And also, a puppy.)
Vivian had a literal unicorn…and tragically lost him while she was pregnant and already chasing a three-year-old. Her daughter is a kirin, a lucky Chinese unicorn, but can’t finish a meal in less than an hour, her son is eight months and already has four teeth, and she’s working full-time as a nurse. She doesn’t have the time for romance, no matter how handsome the new temporary pediatrics doctor is or how good his cookies are. She definitely doesn’t have time for a puppy.
As a unicorn shifter, Doctor Becket can heal anything…except for a broken heart. The only problem is that every time he does, he loses a little bit of his own lifespan. He’s made peace with this trade-off…until he meets a courageous single mother who reminds him what there is left to live for.
Instinct tells Becket that Vivian’s home, with her two adorable children and their new puppy, is exactly where he needs to be, but how can he risk her happiness and safety? Especially when someone who knows his secrets is willing to do anything to get him back…
Is it possible that Vivian will love two unicorns in her lifetime and lose them both?