I'm not buying this carp. If she did this to Kyron, it wasn't some erratic emotional outburst or mood swing, but a carefully planned sneaky evil plot.
I think Kaine is trying to find solace in the fact his entire life with this woman wasn't some big lie, and he surely feels guilt over Kyron's disappearance. It's easier to blame something else, something outwardly, than believe the person you loved, married, and had kids with is a liar and capable of hurting you and your child. It's easier than believing you were that blind and foolish to not see it. Not saying Kaine was blind or foolish but just that HE probably feels this way, and now he needs an explanation for the unexplainable. It gives people peace of mind to be able to find a reason for the unreasonable.
But anyway....