I fear that you will find an A eventually. It just almost always turns out to be the case. However, the miscarriage is really playing with her emotions right now and she is in serious denial. Women can still get post partum depression after a miscarriage. What you are describing is pretty typical after multiple miscarriages. She feels worthless as a mother and a woman. She feels unworthy of love from you and her son. She's using the unhealthy behavior to medicate the depression.
Have you discussed this with her at all(prior to the current sitch)?
