Alpha's second mate

When Alpha Xander was 12 he found his mate his best friend Ali he couldn't have been happier knowing he'd one day get to claim her as his own., his happiness wasn't meant to last just 3 weeks later Ali is dead and he's lost.

So he starts a new life never looking for a new mate or ever thinking about replacing her at all. That is until he accidentally finds Sacha she's his second chance mate and although she is all he can think of he knows that happiness can be taken away at any moment.

And what happens if she has a secret, I secret she's unwilling to share.