Snowflakes Cause an Avalanche- Maximum Ride Fanfic

Snow has been there for the Flock since the very beginning. She was grafted with avian DNA and has the sonar hearing of bats. So when the world starts to come to an end and Max meets Dylan, and the whole 'perfect half' thing starts to play out, why is it that she is stuck between the love of her life and her actual 'perfect half'? And how does the Flock feel about this?