Bestie's Alpha Brother

That night I found out my Beta husband banged my bestie, who is 10 years younger than him, I also slept with someone 10 years younger than me in a bar. When they decided to kick me out of the pack, my ONS showed up unexpectedly and stopped them. He turned out to be my bestie's brother Chris, the supposed Alpha heir of the pack.
I thought what between us was just an embarrassing one night thing, but he wouldn‘t let me go again, and claimed that he had a crush on me since years ago…