The Latest with My Father's Wife

Okay, so, this is the latest:

I had an email from my sister the other day to tell me how when she had called for my father the other night, Lori had answered the phone. Lori then proceeded to tell her about the 75th birthday party she's planning for my father near the end of September. She then tells Jen (my sister) that they all (Jen, her husband, and the kids) are invited to the party, but that Jen has to be there. Uh, my sister lives in freaking Oregon! (My father & Lori live in New Jersey). Lori then proceeds to brag about how she is flying her own daughter in from Kansas for the party.

Now, Lori knows:

A) That my sister, etc. were all out East in Vermont for a family vacation just three weeks ago (she and my father even visited them there).
B) That my sister works. That her husband works. That the kids are back in school (and have about a bazillion activities and commitments).
C) That their trip to Vermont in August was basically their travel budget for the entire year (they had also paid their share on the lake house the my brother-in-law's family rents there every year up there).
D) That my sister's mother-in-law in Vermont is right now in hospice care and is not expected to live much more than another couple of months (so they are all going to have to pay for another trip back East sometime in the near future).

One might also ask, why didn't Lori mention something about this shindig when they were all together three weeks ago? Or mentioned even earlier, maybe money could have been saved, plans could have been made. Or (even better) a party could have been planned for the time that they were all already going to be here. My sister is pissed. I wonder if it isn't some conspiracy to illustrate to my father what horrible children he has ("look, my daughter TANYA managed to come all the way from Kansas!" -- I should also mention that she just flew her daughter out to NJ for a visit two weeks ago! And why shouldn't she? It's not like she contributes any of her money towards food or electricity or running the house or (heaven forbid) the 200K of improvements and renovations they want to do to the stupid house, no that all has to come out of my father's income and also by cashing in our inheritance).

Oh, and before you ask, I have not yet been invited to this party at all. If my sister hadn't emailed me the other day, I still wouldn't know about it. Maybe I'm not meant to be invited at all (I don't know which day the party is on, but at least one of the dates around that time I have to be in Boston for work anyway).

But I'm not bitter ...