In a perfect M she would be asking you to go with her and telling you all the details.
I disagree that in a perfect marriage she would ask you to go with her.
I think a perfect marriage has room for each spouse to build friendships and have independent adventures.
I agree with Rose. Though if my partner told me that they were "going to Florida for 5 days", I'd want to know a lot more detail. Id for sure ask who was going, where theyre staying, what kinds of stuff theyre doing. Not necessarily because of a lack of trust, but because Id want to be involved in that person's life and be a part of what they are excited about.
But I wouldnt feel like I had to be invited if it was just a same-sex weekend getaway. I would say that if it was a couple's event, I would definitely feel left out and hurt to not get an invitation.