Dang the world has changed so much in the last 7 years.
They could very easily just go DINO (Dual Income, No Offspring). Lots of couples don't have children in this economy.
And what argument is there against them getting married?
Inbred children? They could adopt, do surrogacy, abort the baby or just not have children.
It's gross? That logic wouldn't work to ban homosexual marriages, so why should it work here?