You're funny. Of course not. If your spouse is going to date someone wouldn't boredom be a better reason than actual caring about them? No kidding. I get it.
At this point, you are giving him a lot of credit. I think that event sounded like lots of fun. That's why she wanted to go and it would have been fun for the kids too. (I don't mean to be disrespectful for the person being memorialized....but I think you understand that.)
And really, one of my concerns about being a single mother is finding a guy who wants to date a single MOTHER. That's probably where she is....it's tough out there.
I think continue to show her you've been doing a lot of soul searching and changing. Let her make the choice.