When Everything Is Yours To Keep

There was a housewarming and all four friends met up. Mother A, mother b, mother c and mother d.

Mother A, "My son recently bought a very cool sports car for his girlfriend."

Mother B, "Wah! Sports car?! Well well, my son bought a condo for his girlfriend. I bet that's more epensive than a sports car! How about you mother C?"

Mother C, "My son bought a yacht and gave a pair of tickets to Europe, New York and New Zealand for his girlfriend. I bet that's more expensive than a sports car and a condo. How about you mother D?"

Mother D, "My son recently received a very cool sports car, a condo, a yacht and a pair of tickets to Europe. New York and New Zealand."