D.B.
I truly believe that you are seeing the effects of jealousy. She doesn't know how to respond to the way she feels. She can not really verbalize it. You have obviously betrayed her in your 1 on 1 relationship by bringing in these other 2 things and she feels abandoned. Very difficult for anyone to handle so how can a 2 year old. You need mommy and me time with just her regularly. Don't talk about those others during this time. Do something that makes her feel special and touches on that 1 on 1 relationship feeling. Tell her how important she is to you and how much you need her. Mommy needs lots of help and can't do it without her. Maybe she needs to feel like your buddy some.
Good Luck