1) only child, but I get the idea.
2) Dude. They literally went into a pair of cages 24 hours ago trying to murder each other in storyline because they literally could not stand interacting with each other. Candice reverse-ranaed someone in the match from off the goddamned cage, and Io's primary character trait in NXT is it being on-sight with Candice.
It's illogical and undermines their storytelling. No amount of attempting apologism is going to change that. This isn't some 'we're family but fukk each other up' thing... it was less than a day ago, and the girl added latest to that match tried to effectively end someone else in that match's career. Them just standing around together, or worse, Io and Candice doing a run-in to help Rhea win the match? No. Trash storytelling, period.