This season there is a team made up of a biological mother and her daughter she placed for adoption. The first episode was last week, and it was interesting to see them interact. The first time they spoke on the phone was when they submitted their application and it is unclear if they met or interacted much prior to meeting up on the race.
You can see how they are a bit unsure about how to interact with each other and they want to take advantage of this time together.
I am looking forward to watching their relationship develop and I hope they make it far on the race.