People who don't suffer from infertility or secondary infertility have absolutely NO idea how painful it is for those of us who cannot conceive. I had a panic attack and broke down sobbing at my best friend's baby shower (I had my third miscarriage the week before) and had to leave. I felt horrible for ruining her event, but she didn't feel like her invitation was inconsiderate given the circumstances, and would not allow me to bow out gracefully.

Your comment was not so offensive to me, but perception varies greatly by individual. I'm sorry your sister-in-law treated you this way, and now is pretending nothing happened rather than talking it over and accepting your apology.

What would you like to happen next? Do you want to reconcile with her personally, or just stop being excluded from family events?