The step-Mother-in-Law

I just want to know if I'm justified in being uspet at this woman, or not.

She's my husbands, father's new wife. We got marrried March 2nd and found out we were pregnate April 2nd. John and Heather got married May 12th. John has said congratulations and everytime he see's Adam or I he asks how me and the baby are doing. Heather on the other hand has not spoke a word of congratulations since their wedding has made it a piont to not even speak to me. See Adam has ssen Heather more often than I have and she hasn't said anything to him, the few time's I've seen she has avoided me, and last time I saw her I tried to say hello and she turned to talk to John as if she was ignoring me. I understand she may not have heard me but we were less then three feet apart and Adam barried in the garage somewhere even noticed it.

My Mom thinks Heather may not like me becuase it mean she isn't the only new person in the family, and with me having a baby, it takes away from her fame even more. Adam and I think it's that and the fact that Adams Brother and sister-in-law have made it clear they don't approve of John and Heathers marriage, perhaps she thinks I feel the same way.

Either way it just seems to me that she is holding and obivous and absurde grudge towards me. I don't know what I could have done, but it really bothers me that she's been like this.

I know I'm pregnate and that I can get emotinal but what kind of a woman can dislike a person so much to not even say "congrats hows the baby" two month after her wedding has past. I make that piont becuase I do understand she may have been distracted prior becuase of her wedding plans. It's just that this whole thing really dose bother me so much that i don't want ot invite her to the baby shower, i don't even want her in town when I go in to labor, I don't want ther to visit me at the hospital or even after we go home after the baby is born. I'd rather see my husband ex fiancee than any woman that would show a pregant mother that much disrespect for no apparent reason.

Am I wrong and being way to hard on her? Or do I have a valid reason to be upset?