Board Thread:Speculation House/@comment-108.69.217.22-20160216061533/@comment-4010415-20170115035514

What Phantom said is basically one possible explanation I came up with:


 * Tai and Summer dated at some point


 * Broke up


 * Tai got with Raven


 * Had Yang


 * Raven left


 * Tai is alone with an infant, his first child, struggling


 * Summer moves in with him to help


 * Tai and Summer work together to raise infant Yang, acting like parents together


 * This rekindles old romantic feelings


 * One night, a moment of weakness turns into a night of passion


 * Whoops, Ruby is conceived