DP and I have been invited to a family members party this upcoming weekend.
Family member has messaged me tonight saying they've also invited X (another relative).
They said in the message they've invited X but not their partner (they don't like X's partner). They've also told X that DP & I will pick X up on our way to the party.
DP is really annoyed about this for several reasons.
One is that it isn't up to the family member to tell X that we will pick them up. DP says that's cheeky and dictating what we do.
Also, DP said it isn't fair that we go to X's house to pick them up knowing their partner isn't invited as it's leaving them out.
I completely understand where DP is coming from and agree. But DP wants me to message family member to tell them that it's inappropriate that they've involved us in something that has nothing to do with us. (As in not inviting X's partner but telling X we will go to their house to collect them).
I don't want to get involved at all.
Sometimes I can be quite passive.
DP says we already are involved, thanks to family member so I should message them expressing this.
What would you do?