Surely you could find her somewhere else to sit >Here are some pics to help.
When you click Go Advanced at the bottom of the screen you'll see this.
If you click on the paperclip, a pop up will come up that says Choose File, then you can attach a pic off your computer or Documents or Picture folder from your smart phone.
If you click the yellow icon instead, a popup that says "enter the URL" will come up, and you can provide the internet address of a picture that you already have posted somewhere else, and that picture will show up.
For instance, see this pic of the woman on a Panigale? I've highlighted the browser address to that pic in blue.
If I put that address in the URL popup, it'll post that pic directly onto the post.