Ok, I think this was an old Mary Tyler Moore show episode but I’m not 100% sure.
Female lead is having a party/get-together. Her father(?) is there. Somehow someone (one of the guests at the party?) sees a manuscript in the spare bedroom where dad(?) is staying. The guest (who, if it was the Mary Tyler Moore show, would have to be Ted Baxter) takes it into the main gathering. He announces that he will read the manuscript. Dad protests that it’s not read, not complete, guest pooh-poohs Dad’s objections. Guest (and one other guest?) go into the spare bedroom and start reading.
Party continues. A little while after, the guests who were reading the manuscript come out, in awe and in tears–“This is magnificent! < sob > The part where he has to sell the couch his dad made <sob sob> It’s the saddest, most beautiful thing I’ve ever read. We’re only partways in but this is wonderful”*
Other guests are now intrigued. First/Pushy Guest separates the first chunk of the manuscript (that he’s read) from the rest and pushes into the hands of someone else. More people go into the bedroom to read it. As they do, they also rave about it, sobbing at various parts.
Party is losing momentum fast. The manuscript gets more and more sub-divided as more guests disappear to read it. Finally, it’s just heroine and dad in the living room.
Eventually, first guest gets to the final page of the manuscript…which just stops.
Dad shrugs and says “I told you it was incomplete, unfinished”.
Slowly guests leave. Heroine and dad talk, she says “Why didn’t you tell me about your book?”, Dad says something about how he’s been lugging it around for 10 years(?) hoping to get the spark of inspiration back that got him through the first 2/3ds. Hugging and stuff concludes the ep.
This ring any bells for anyone?
*I have no memory of the specific part. Don’t get fixated on “the couch”. I just made that up as an example.