A Ship Crashed but Managed to Set Sail Again

The Deal

Hamilton's POV:
I see John run away with tear filled eyes and I hate it. I didn't want to hurt him. As I was rethinking about what I did, I hear a voice behind me.
"Didn't know you could hold on to the deal. Hamilton." A man in a magenta shirt and black pants stands behind me. He has an afro of hair and a smirk on his face. "What do you want Jefferson?" I said turning around with a growl. "Hey, take it easy tiger, you upheld your part now I uphold mine. Here's the everything I have on her.... Just stay away from John and the secret dies with me" he said with a grin. He love watching Alexander suffer with misery. This has been going on since that were young. "Why are you still here, Jefferson?" "I just want you to know that I enjoy watching this. Just like when you lost your whole family on that little island, you lost John as well." I punched him in the face, leaving a big red mark and a bleeding nose. "You already took John from me and constantly remind me of my past, why can't you leave me alone!!" I yell. I see Jefferson get up and glare at me. "This isn't over Hamilton. I'll get my revenge." I see him walk away and when he's out of view, I fall to the floor and start crying. "I'm so sorry..... John. If only I could have the guts to tell you."
So I'm back and am surprised I finished two chapters. Sorry if they are short, it's 2:30 here so yeah. Anyway, what was in the envelope? Who is the "her" Jefferson was talking about? And what does Alexander not have the guts to tell John? That's for me to know and you to find out. Tell me in the comments section.