We recently instituted "Sunday Dinner" at our house. This is basically an open invite to any and all members of our friends and family who are free and hungry on any Sunday. This can result in a pretty mixed bag of characters from our tangled family tree.
Likely attendees to our Sunday Dinner include actual biological parents (Jennie, Larry, and Marti when she's in town), "friends" of parents (Connie), ex step parents (Martin), new "friends" of ex- step parents (Lisa), ex "friends" of ex step parents (Mira or Sage), children of ex step parents (Evan or Caroline), children of children of ex step parents (Grace), children of "friends" of parents (Bess), and tonight, half siblings of children of "friends" of parents (Kit).
If you REALLY want to get technical, Kit is a re-half brother to Bess. Seriously. Their parents (Connie's ex) got together, making them half siblings, then divorced, then back together; So re-half sibling of child of friend of parent.
Did you follow that? I totally didn't make it up; I'm not that creative!