It's understandable to feel confused about your husband's comments during the work dinner, especially considering the context of your past and how you've both moved on since then. Here are some possible reasons why he might have felt compelled to bring up your past relationship during that conversation:

1. Processing Past Experiences

Your husband may still be processing the past, even if you have both moved on. Sometimes, unresolved emotions can surface unexpectedly, especially in social situations where past experiences are discussed. He might have thought that mentioning your brief relationship was a way to acknowledge your shared history, but it could have come off awkwardly.

2. Seeking Validation

In some cases, individuals may mention their partner's past relationships to validate their own experiences or feelings of insecurity. Your husband might have felt the need to remind others (or himself) that you also had a relationship during your time apart, perhaps as a way to equalize the narrative. This can often stem from a place of vulnerability, where he might still feel the impact of his own actions during that time.

3. Social Dynamics

Social settings, especially work-related gatherings, can lead to a desire to fit in or entertain. Your husband may have thought his comments would add an interesting twist to the conversation, not realizing it would create discomfort for you. He might have been trying to engage with his colleagues by sharing a more complete picture of your history together.

4. Lack of Awareness

It's possible that he did not fully comprehend the emotional weight of the topic. He may have felt comfortable discussing the past, assuming that both of you had fully reconciled those experiences. Sometimes, people can be unaware of how their words affect others, especially in a casual or light-hearted context.

5. Communication Styles

Everyone has different communication styles, and your husband's approach might differ from yours. He may feel that discussing past experiences openly is a sign of honesty and transparency, while you may prefer to keep certain topics private, especially in mixed company. This difference in styles can lead to misunderstandings.

6. A Test of Trust

Lastly, he may have been subconsciously testing the boundaries of your relationship. By bringing up past relationships, he might have been gauging your reaction to ensure that both of you have truly moved past those experiences. This could be a way for him to affirm the strength of your bond today.

Conclusion

Ultimately, the best way to address this situation is through open and honest communication. Consider discussing your feelings with your husband, expressing how his comments made you feel during the dinner. This can help both of you understand each other's perspectives better and strengthen your relationship moving forward. Remember, it's normal for couples to encounter bumps in the road, but addressing these issues head-on can lead to deeper intimacy and understanding.