Twin Dynasty

Alec is stern but a true softy for his family and friends. Especially his twin sister Cheyanne.
Cheyanne is a trouble maker but she truly has a heart of gold. What caused her to put so many walls up? Can anyone break them down and see the real her.
Magnus is a centuries old warlock who has all but given up on love. Can one shy Shadowhunter make him see that he can still love.
( BTW this is also an Alpha/Beta/Omega fic.)