Sweet Biscuit, Donut Joe and their daughter Caramel Cream.

Sweet Biscuits is sister of Duke Blueblood, Their parents Duchess Graze Star and Duke Marquis actually never wanted second child, Blueblood was supposed to be the only one. Her name was originally Perfect Gem, she changed her name to set her apart from her family who never actually wanted her. She changed it little time after her parents died, at the same time she made her relationship with Donut Joe official. Her parents never approved the relationship, but it still actually existed for long time. 

Soon after that she got married with him and she got pregnant, They got a child Caramel Cream. 

First mentioned: fav.me/dc4h0d4

Caramel Cream: fav.me/dc4j5el