fat fleshy green stems, lobed leaves and has just made smelly flowers

It's quite a fast growing plant, has fat fleshy bulberous stems, green lobed leaves. The ones that have had more light have grown really fat stemmed like a banyan tree. The ones with less light have got taller and leggy. It's just started flowering with small flowers that smell rather like poo.

Eww. Not something I would really want in my house, thanks! From the picture, I can't say that I recognize it and certainly not from your description either - it's a mystery.

Hopefully, someone will see it and know what it is - hang in there!
Jacki