Big sister is jealous

I have an 11-yo step daughter and she's starting to act a bit jealous. For example, my husband said how in love he already was with our baby boy, and she goes "what about me?". We love her so much and it breaks my heart that she would ever question that, even if it was just her saying and not feeling that. Of course we immediately said we're so in love with her too and remind her several times a day. She's only with us on the weekends and we're trying to keep her as involved as possible in the process (helping w the name, attending the anatomy scan, picking out clothes, etc). Any advice? I want her to feel as loved as she is!!!!