BOOK REVIEW- ONE HEIR OR TWO? by Yvonne Lindsay

Kayla Porter vowed to be a surrogate for her deceased sister's embryos. She's already given birth to her niece Sienna. But a clinic crisis means she's running out of time to fulfill her promise. She needs Donovan Murphy's help—if they can work around the explosive chemistry that's reignited between them! 

The tech tycoon agreed to be a sperm donor, not a father. But that changes when he meets his baby daughter Sienna. He will claim his little girl…and her passionate, headstrong mother! 
 AMAZON 3.5 STARS

A good story idea with interesting main characters.  Donovan or Van as Kayla calls him may have made it big in the financial realm but he is running scared when it comes to anything emotional.   Because of so much pain that began in his childhood, he has iron control of his feelings.  He can refuse to feel. 
Kayla is a wide open, feeling woman.  She has lived a fancy free life up until she took up her sister's dream of children. Then she got a big wake up call when it came to responsibility.  She still jumps heart first with both feet but now she also is totally invested into the children.
So you can see that this is going to be an emotional story with some cruel moments from Van as he tries to deal with everything in a cold and distant manner. 
I gave this a 3.5 Star rating on Amazon because it was an okay story. But I gave it the extra points for the emotional parts of the story being well done.  Also because it wasn't your usual type of story.