How would u react?

A few days ago, my husband tells me a that 1 of his old friends (female) wants to catch up with him via drinks LATE Friday night. Like 11pm kinda late. First of all, I had no idea he still talked to her and second of all, I find that time to be very inappropriate since he's a married man and we have a 17 month old together. However, he also asked if I wanted to go so that's not as bad I guess. But no idea how we're going to get a babysitter that late. When I asked him why so late, he said she wants to meet up after some sort of fundraiser that she has going on for her son's baseball team. Which, I don't really know why a kids fundraiser would go that late. So anywho, part of me finds this entire thing odd and I feel like I HAVE to go just to see what she's all about. But another part of me is like fuck it, I don't want to go out that late so just stay home and hope this girl isn't up to something shady. I also asked why she randomly came back in the picture and he said he bought some air freshness from her for her son's fundraiser and she wants to give them to him. Again, I didn't even know they were talking still. But he has a Facebook and I don't so I'm pretty sure that's how they talk...