Looking for a story about a hyper futa mom

Story by Gladosaltmer

Hi, I'm looking for a story I can't find anywhere. I don't remember where I read it, but it was probably in here or in Literotica, although it could be in some other site too. The story had some elements of futa on male, incest, cuckolding, excessive cum and hyper cock.

The story started with a guy and his girlfriend in his bedroom after sex. The dude wanted his girlfriend to sneak out of the back of the house without his mom noticing, but while they where trying too sneak out his mother's "girlfriend" found them. 

I don't remember much how it continued from there but I recall the mother having an enormous dick and cumming a ton. I also think she was like superstrong and actually worked out lifting huge weights at the end of the story, but not completely sure about that.

Hope somebody knows what story I'm talking about and can find it. Thank you! ?