Bonus commission from buyer to listing agent?

[Nat C.]

I went and saw a property today that came up on the MLS. I called the listing agent and said I want to submit an offer at list price. So we made plans to meet tomorrow.

Then she sends me a text and asks if I can do bonus commission. I had no idea what that was so I asked what she meant. She texted back that 'some buyers offer bonus commission to listing agent- its totally legal'.

To me it sounds like bribe money. 

I'm a direct buyer with no buyers agent so she'll already get a 6% commission as opposed to 3%. Does anyone have any thought about offering a further 'bonus commission'?