I just re-read the entire thread. Happy to hear you and DW had a wonderful time in Cabo!
Sending your DW good vibes. It is hard when invites like the one from SIL#1 come. While SIL might think she is playing peacemaker, I have a feeling it felt like a very familiar slap in the face to DW. Once again, she is being asked to act as if everything is resolved when nothing has been.
P.S. Seems like Vlad was smart enough to not need college. He’s got a cushy life with two servants attending his every need.