Guy I’m dating sharing a Spotify playlist with a female friend ?

I’m dating a guy who has female friends which I personally have no issue with. I know he has a secret Spotify playlist about me and I haven’t mentioned it yet as he gets embarrassed etc but I found it and every so often check it to make me smile. However I noticed that there is a new collaborative playlist with a woman he was already friends with on Spotify. It was made about 3 weeks ago and she added 2 songs and then today he added a bunch of songs, then she added the most recent song from the playlist about me.

He’s a bit older than me, he’s 38 and she’s around his age, I found her on socials and she was or is married and has kids. The Spotify is their initials.

I want to bring it up but then I have to reveal I have been checking his Spotify. He sent me a message yesterday which was his usual warm tone and asked to meet. I haven’t replied and then I said can you call me, he then got back to me and asked if he could call me lunchtime tomorrow. I haven’t replied yet.

We’ve been dating for almost 3 months and been building towards a relationship. Idk if it’s just innocent and sharing music, the songs aren’t romantic they’re lofi vibes.