my cousin wants me to put in Skins +9.5 over 39 for him, don't trust him, what to do?

[zoo youk]

should I put it in? should I just book it myself and hope it losses?

thing is, I think it is a winner.

I really don't think he is going to pay me. so I dunno wtf to do. telling him no is really not an option, considering the things he has done for me through out my life.