No worries. Maybe I missed it. (I do that from time to time)
Anyway, it really edpends on WHAT the boundary was. Also, boundaries...are there for a reason yes, however, they should be "fluid" and everyone needs to be open to the possibility that they COULD be crossed. Not that they SHOULD be crossed, but they COULD be crossed. Obviously, preferance would have it that they NOT be crossed, but it can and often DOES happen. So have forgiveness in your heart. If it happens more than once...Replace forgiveness with distrust and end the relationship, or get used to it.