Ответ:

Mike and Christine are Daniel and Andrea’s parents. Daniel and Andrea are married and are Craig’s parents. Phil and Sarah are married and are Jack, Katy and Alice’s parents. Phil is Daniel’s brother; Andrea is Phil’s sister.

Craig is Jack, Katy and Alice’s cousin. Daniel and Andrea are Jack, Katy and Alice’s aunt and uncle. Phil and Sarah are Craig’s uncle and aunt. Mike and Christine are the children’s grandparents.