a canadian welcome - You shake hands and then you sit on the hands and let a fart

You shake hands and then you sit on the hands and let a fart fly into the other person’s face like they're your new stepmom.

I shook my uncle's hand and then he sat on my hands and blasted a fart in my face like I was his new stepmom.

At the family reunion, I shook my aunt’s hand and then she sat on my hands and gave me a fart like I was her new stepmom.

My cousin shook my hand and then sat on it and gave me a fart like I was his new stepmom.