He actually has two foals planned out in the near future - one with Aithniel who will be played by Nova, and one with Tiva who will be played by Pare. If you have a twin pass, and the mothers/other foal players don't mind, you could have your kid be a twin to one of those? :D
I'm also currently holding apps for a Gaucho X Nyx twin if that interests you? :D the thread is in the plotting board (can't link cos phone).