I didn't give her any advice. What happened was unexpected for me. I listened to her the entire time.
I just feel thankful that she saw me as trustworthy (sorry for sharing it here, though, but she still remains anonymous),
and a "good enough" company for that kind of conversation. I'm single and she's married, we have more than 10 years' age gap.
I really think it is extremely difficult for sisters, especially elder wives, to open up their hearts and share their sad stories for fear
of being judged. I remember her saying "I cannot tell this to anyone. What would they think--that living this kind of life (in the truth) is not happy?"
:( What really pains me more is about her being sad and full of what-if's.. what if she had a child? Too late, she thinks.
:(