its easy to say forget her and repopulate till you imagine how the next generation will come.
and you shouldnt just simply leave it up to your kids to forget each other. thats not as healthy of a gene pool.
you and your woman are at the top, more pure at you are the only unique ones left. YOU should be loving your daughters, and your grand daughters.
and your son should be loving your woman.
its only slightly better then the children siblings mating on each other.
do you want a super fast repopulation? or a strong healthy one.