Is this more than just a friendly invitation?

F20 I met this woman at my job and she is a lesbian and she is a lot older than me. She’s in her late 30’s I believe . She has a wife however she always tries to engage with me which I don’t have a problem with I don’t mind having friends. But she’s spoken to me about us hanging out and saying how she hopes I don’t find it weird or anything. I told her I don’t mind as I thought of it as like just friends idk . However this morning she messaged me saying that she would like to invite me today for a movie and lunch with her and her wife. Idk if I’m crazy but isn’t it a bit odd? I’ve never met anyone who invites people to go out with their partner to a movie and dinner and the age gap is huge. Idk if she cares for me in a mothering manner or if it’s something more to them? She has flirted with me before and called me attractive , and I find it more odd that she herself finds it weird to invite me out. I also don’t know her wife like that , I’ve only ever said Hello to her once .