Why did my friend’s husband do this?

One of my friends invited me to join her, her husband, and their friend, along with their friend's fiancé, for dinner.

Due to traffic, I arrived a bit late. When I walked in, I greeted everyone and started chatting with my friend and her husband.

Shortly after my greeting, I noticed my friend's husband smiling and looking over at me to his friend, who was there with his fiancé, and his friend started smiling and nodding at him. It felt quite odd.

Although they could have been discussing anything, I couldn't shake the feeling that they were talking about me. I'm curious about what this could mean. What are your thoughts?
Why did my friend’s husband do this?
Post Opinion