Catherine Seiver Windle - Age Inconsistency? I Think Not

I'm beginning to distrust the pathways to a relationship used on this site. I decided on a whim to hit check for inconsistencies, and I found one that suggested Catherine Sevier Windle was all of two years old when she had her first child. I just did the math myself (not to worry, I used a calculator). She was born in in 1815, and her son was born in 1846, both according to the profiles on this site. That makes her thirty-one (31) years old at his birth. Hardly too young.