Sure it does ... or rather, "how NOT." A silly premise makes the rest of the question pointless.
Naw...There is scripture that overwhelmingly shows Jesus had brothers and sisters...There is no scripture even hinting that Mary never had more children...
What is pointless is go on to any further estimation when scripture paints such a clear picture...
I think it is curious that the actual question is being avoided here. It is far from a "silly premise" since the question of Mary having other children after Jesus is NOT settled - even to this day. It isn't a black or white conclusion and, instead, has many Biblical evidences for the affirmative. Those who refuse to consider the possibility do so because it WILL affect their ultimate view of the mother of Jesus. That was the point of my hypothetical. You have answered it whether you know it or not. Thank you.