Am I wrong for expecting this from my husband?

He's got a daughter with his high school girlfriend, and she started keeping the child away when he got with me. He had to take her to court. We'd been married for over a year Last Mother's Day and my stepdaughter is attached to my hip. She loves me so much and I love her. I ALWAYS pay with her, buy her little surprises, and just love her with all my heart and soul. She's so sweet and smart and amazing. Her real mom has her most of the time and has caused all kinds of problems for us and is really a terrible mother. But last Mother's Day, my husband left me at home without saying a word to me, and come to find out, he went to take his baby mama food and tell her happy Mother's Day. The girl who kept his daughter away for months while he cried until they went to court, which I helped him with getting a lawyer. Then he comes home all nonchalant and I said I was hungry and he said to go make myself something. I said "I thought you'd want to go out to eat." He said "what is today?" And I said "mothers day." He said "and what's special about that for you? You're not a mom." I immediately left the room and just bawled. He always says how great of a stepmom I am but yet says I'm not a mom when I do more for my stepdaughter than her own mom, yet he chose to be with her. The next day, he apologized and said he didn't think about me being a stepmom. Idk if he did or not. But it really hurt me. Well for this coming Mother's Day our daughter will be a month old. (I'm pregnant.) Am I wrong for expecting the best Mother's Day in the world? He hurt me so much last year. 
Edit: He always tells me (even before all this) that I'm an amazing stepmom, etc. We were going through a phase then because of his baby mama trying to get him to leave me for her. She kept manipulating him by using their daughter. Anyway, that stuff is long over now after I laid down the law. We don't have problems out of her now (she's actually civil with me finally) and he's stepped up and is a great husband. He kept telling me after that he'd make the next Mother's Day the best ever. I feel like I deserve the whole works.