Anything is possible. But the doctors are pretty clever when it comes to this and can usually see right through them.
Thanks for the comments is there anyway she could fake the physc eval and it to not be caught.
Yes, having a psychological evaluation of your wife is needed, for all of you. She is having paranoia which can worsen if not addressed. Women can become very emotional during pregnancy, but nothing like what your wife is displaying, and she is no longer pregnant. Her reasoning for stopping her medication may have been due to paranoia. Your wife needs help and you DO need to keep your daughter's safety in mind. Know that your wife cannot help herself, and it's not intentional, she is sick and needs professional help. But still your daughter's safety is an issue here and you're right in being concerned. I hope this helps, it''s a difficult situation for you and I hope you can get her help. Take care...