What a stretch! Jesus did say she was being taken away from her children but that John was to look after her as his own mother and she was to consider John as a son. You are adding what is not stated again.
Jesus cannot do that (the underlined part) without sinning.
It is a sin for a Jew to invite, or permit, another Jew to ignore the commandments of God.
Unless, of course, there was no younger sibling in the first place.