Wife not being introduced to female co-worker

I asked my husband whom he found attractive at work. He was honest with me and told me. I was curious and I thanked him for being honest with me. I worked there for a while also, though in another department, so there are many people I have not met at his company. She is at least 20 years younger than he is, married I believe and has a 2yo little boy whom she sometimes bring into the office. My husband jumps right in and holds her child every chance he gets. no, it's not his. I would normally have no problems with this, however, several times a year, my husband and I attend work functions. She is also at these work functions. My husband introduces me to most people there I do not know - except her. We were heading straight towards her at one function and he was staring at her, she is beautiful, and young, and then he changed direction to avoid her. I can't help but think "What is he hiding from me? Why won't he introduce me to her?" I hope it's not my imagination but I have noticed her looking at him expectantly when he walks into the room full of co-workers. And I can't help but think "If I weren't here, he'd probably go and chat with her" , "What does she think of the fact that he avoids her when his wife is by his side?" Wouldn't this confirm his attraction for her? I am just putting myself in her shoes, and if a married man who was very friendly with me at work all of a sudden ignored me when his wife was around, I'd suspect he was attracted to me and didn't want his wife to find out. I've talked to him and have asked him why he does not introduce her to me and he said because I'd be jealous. Here's the thing: I'm not jealous of women who are more beautiful than I, I am not envious, I'm comfortable with who I am and wouldn't wish to be in their shoes. I am however uncomfortable with the knowledge that my husband refuses to introduce me to a co-worker whom he's admitted he finds attractive and whom he does have regular contact with at work. I don't know how to explain to him that his behavior towards her when his wife is by his side makes me suspicious. I would on the other hand, not be suspicious if he introduced me to her. By being introduced, I'd think nothing of it all. I am wondering if this is normal, ok or should I be worried? Should I mention this to him again? Have I not addressed it right? I'm curious to find out what both husband and wives think of this issue.:scratchhead:

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