Pregnant With My Mate's Baby And He's an Alpha

Hi my name is Becca waters. I am a she-wolf and the daughter of the alpha of crystal moon pack. I also have a twin brother named Hunter. I live in a small town in Canada were there is a lot of partys. On my 18th birthday I met my mate. He had amazing red and blue eyes he was tall like 6'7. When we slept together it was amazing but the next day he was gone like poof gone and all I knew was his name Zack. After that night I found out I was pregnant with his baby.

Zachary Clearmoon alpha of the clear moon pack. Total sweetheart in tell he has to protect his pack from outsiders or evil wolf packs like the red blood pack. One day he get an invite to a party for the crystal moon packs alphas daughter and her twin. He thought it was weird but he went anyways and when he got there he smelled the most amazing sent ever it was his mate.

What will Becca do will she if her mate and tell him or will she not tell him? What will Zachary do when he needs his mate?