I have been having sex with my 2 neighbours from a couple of years. They are siblings. The thing is that neither of them knows that I have been fucking their sibling.

The elder is unmarried while the younger one is married but divorced and has a 4 year old kid. I want to have a threesome with them but the problem here is they are homely woman who have been manipulated into this by me.

I fear that my threesome fantasy might just rob my chance of being with them individually. I am married and my wife is aware of this.

Pls suggest me some ideas to have this threesome fantasy changed to reality.