Sure, but the same is true for using birth control. When was the last time you saw someone excommunicated for that? That's what I don't get. They are obviously willing to bend the rules sometimes, so why not this time? If this poor woman doesn't deserve compassion and forgiveness then who does?
To clarify a misconception - no pun intended, there is no prohibition in North America. Catholics are free to follow their conscience on birth control.
In the US (Must be the same in Canada) 97% ± 3% of Catholic women of child-bearing age use or have used artificial birth control. (Source will be provided upon request). So, 100% is within the margin of error.