No matter what, maybe bad luck, but she wasn't blessed with a child.
Eris felt really troubled about this.
I often found her talking with Sylphy night after night after I got home.
She didn’t want her insecurity known to me, so I won't give the details of the conversation, but I might have heard some dreadful remark such as [...maybe I need to do it more often].
Anymore than this... I won’t survive with that much of a nosebleed.