Compost Pile + Pumpkin OR Squash

A mystery plant in our compost pile!

We planted a couple of old pumpkin seeds elsewhere, but we haven't succeeded with pumpkins or squash in all our years of gardening.  Where did it come from?  A bird, presumably.

I adhere to my Mom's definition of a weed ("Any plant growing where you don't want it") but Belovedest wants to leave it alone.  He says moving it will probably traumatize it so much that we won't get any fruit off of it.

But I had big compost plans!