My question is what could be the remote cause of this act of betrayed?
Many things could lead to having others betray us, even though there's no specific reason that should stand being justifiable for doing this act, but I will mention some few flimsy excuses we often give for going into such act.
1. Anything that involves money has the tendencies of betrayal.
2. Some have this kind of natural mentality of betraying others with or without a cause.
3. Forceful or instigated betrayal, when someone was pushed to act against his wish.