No Mates Journey

I put on "Halo and walking on sunshine " mix cause i felt like singing my lung out on the 'halo' part and dancing 'to walking on sunshine'. Walking to the attic to find some pictures of my dad to put around the house and give him one of us as a family as a going away present. I found a baby picture. Actually a whole two boxes on one little kid,a boy, that had my parents in the pictures. Knowing my mom hated pictures of herself(she liked taking the pictures) and only took pictures with her own family. I got very curious to who this boy was, Jace was his name according to a picture.

"Mom! Dad!" I yelled bringing the boxes down, due to werewolf superstrength i was able to bring them down stacked on top of each other with ease.

"What, honey? I was making dinner." Mom replied coming from the door that connected the living room. Once she glanced at the boxes and looked at the picture in my hand, I handed her the photo with my family and Jace with the word 'family forever' on it. Her pupils enlarged and yelled, "Daniel!" When he didn't answer she yelled, "Alpha Daniel Mooney get your butt down here!"

He groaned through mindlink and made his was down the stairs from his office and went through the same process mom did. Think silence filled the air waiting for someone to answer my unspoken question. Luna Caroline, my mother was the first to break the silence with a nervous, "Do you want to tell her?" My mother looked like she was searching for an answer in his nameless expression.
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Who's in the picture? Did he die? How can she not remember? What if he's alive? Are they blood and her parents banished him? What could he have possibly done to be banished?