Meaghan would have arrived with Caradoc, looking a little exhausted from the limbs&things and a little flushed from the wedding. She would have thanked everyone who congratulated her and hugged Marlene as tightly as she could stand for being alive.
She would have commented on a few things others said (I'll just tag those comments) and would have asked about securing a network for obtaining falsified documents--she knows they have Dung and Caradoc's connections but if they're going to be thinking about doing things like smuggling people out/trying to sneak past the Purists, an established connection that is accessible by several people (just in case) is probably a good idea.
Afterward she would have been very congratulatory toward Alice and Frank, and been internally wiggly about secret Celt!Fetus