Lease Option Instead of Sell - Realtor dilemma

[Mike Stahlman]

We have a house that is supposed to close next week and the buyer is asking us to do a Lease Option for 3-6 months instead of them purchasing the house as planned.  We are under negotiations and the ball is in their court with an addendum.  

The buyer went around the realtors and I do not think that would be ethical.  If she has a legitimate reason to do this, should we just refuse, bring it to our agent for discussion to see if there is another option?

Kind of confused on what is legal and ethical.  

If we work out a lease option, should / can we do that through the RE Agents?

Would they get paid then if / wen the buyer executes the lease or would we owe the agents at the time we lease it?