I have to see my sister in Freo
A made-up story to get out of something. It's like saying you have to go watch your sister do something embarrassing in Freo. No one cares if it's true.
I have to see my sister in Freo, but I don't want to be there when she trips on the stairs.
My sister is in Freo and she's eating a whole cake for breakfast. I have to go.
I have to see my sister in Freo, but I rather be stuck in traffic.