No, TH's teenage son was already living OUT of TH and KH's home, with either his grandparents or his bio-dad, not sure due to conflicting reports. At any rate, he was NOT living with Th and KH, due to the son and Kaine "Butting heads" (normal teenage rite of passage stuff, IMO) He had a regularly scheduled visit with TH AFTER Kyron went missing, and while at TH and KH's home was talking on phone to biodad and mentioned that TH had a poly...TH heard him talking to bio dad about it and freaked out....bio dad said they got the teenage son out of the Horman home because it had "become a zoo". JMO.
Thank God someone is looking out for the teenage son's best interests....