I believe Jesus of Nazareth is the Seed of the Woman prophesied in Genesis.
To fulfill this Prophecy, the Seed had to be conceived, gestated, and born as any other human; the only difference is the Seed has God as His Father, thereby being both God and human - sinless.
As such, the Seed, upon coming of age, could have created another woman, and started a new family.
But, instead of this, He chose to redeem the family He already had, tainted though they were.
These are simply my thoughts on the matter.
Sylvia