Yes, you read that correctly, this pairing isn't siblings, they're a mother and her daughter. You might have worked out that it's Mirielle on the right as you look at the photo, and she's visibly a little older, but it probably took you a moment to see it!
Maxim has her father's eyes, but everything apart from that is the same. They could have looked even more similar than this, because Mirielle's hair is dyed red. When it isn't, her natural shade is the same as Maxim's!