Surrogate mother for daughter?

I recently ran into a 50-something woman who I (being a typical naive male) assumed was overweight.

Later during the day she and her husband revealed to me during conversation over their carpets that she was pregnant with her daughter's child.

Now, I thought at first how very sweet and generous it was for both she and her husband to take on the child-bearing burden.

Then, I thought, wow, that would be weird--being the mother of your grandchild.

Or being the daughter, mother to a child your mother gave birth to.

Would this not get complicated--especially for the child as it grows older?

Just curious of other opinions. Maybe I'm the weird one--excuse me a sec. The wife's saying something--

What's that, Dear? I am the weird one?

General Tsao
Man of Chicken