Tricked

Context:
Yesterday, Uncle Cheong, who did the renovation for our house, came by and commented our car porch and front gate are in dire needs for some make over. Indeed, the paint at the gate had faded and the porch is defiled by black oily grime from our cars. At first, I tried to get rid of them, but all my rubbing and cleaning efforts were proven futile, these stains are meant to stay. After some time, I just leave them as it is. Later that night, while I was helping Mrs Banana with some laundry, we had this conversation.

Mrs B: "You know, I think Uncle Cheong is right. We need to repaint the gate and clean up the front porch."

Me: "I know...... But it'll cost money."

Mrs B: "At the very least, we need to clean the tiles at the porch. The black stain is an eyesore."

Me: "Can be cleaned one.... Just use the water jet spray, the powerful water should be enough to get rid of them."

Mrs B: "Are you sure?"

Me: "Of course! I borrowed a unit before and used it before to clean mum's porch. Moss, dirt, you named it, everything will be out in no time. Too bad I don't have one now."

Mrs B: "Don't really believe you. Hmmmm..... Let put it to a bet. If you could get rid of the black oily stains, I'll pay for the whatever water jet spray thingy".

Me: "Ok. It's a bet!"

She left the laundry room with a smile.

*Blink*Blink*Blink" [Deep thought] I was tricked! I have promised her to clean the porch!