Anyone who comes between siblings is trash. Which is what Moa did.
She slept with Yura and strung him along and then sleeps with his brother only to get back with Yura.
Causing a rift between the brothers (even if they are "fine" in the end) that won't ever be repaired to what it was.
Moa isn't someone who deserves a "happy end" she is a selfish and feckless ho.
Both brothers deserved better. Especially Yura.