I saw this picture of storybook prop pages on OUAT Wikia.
After taking a closer look, I saw that at least two of the pages were about the blended Tremaine family. One is about Ella warming up to Marcus. And the other is about Rapunzel poisoning Cecelia. There's also a page about Marcus loosing Cecelia to the infinite maze. The pages are kinda blurry and partially cut off, but I did my best to read them.
"...man that made her feel safe and filled her with laughter. Although Ella was skeptical of Marcus at first, she came to see what a warm heart he had -- and grew to learn that his heart was big enough, to not just love her mother, but herself as well. Since her own father had long been out of the picture, she...."
"Rapunzel exited the Woodcutter's Cottage. She carried with her a tray of glasses, each filled with lavender lemonade -- her special poisoned one marked by an extra long lavender stem. Crossing the winding path that led to the distant manor, she wondered still if she could really do this. Could she poison Cecelia? Rapunzel knew it wouldn't hurt her, it would just make her go away... at least that's what The Witch had promised. Entering the party, everyone seemed so happy. There were violinist and cellist. They played an upbeat joyous ditty. Rapunzel's eyes couldn't find Cecelia among the crowd, but....
'There you are,' Cecelia said. As she grabbed a lemonade from the tray. Oh no! It wasn't the one [Rapunzel?] had intended for her. 'I'm so glad you [...........] Cecelia continued. 'I don't want [...............] anything to hurt you, [...........] get along... [five?]'
And without even a second thought, Cecelia swallowed back her favorite drink. 'Wow. This one's even better than the last,' she exclaimed!Rapunzel looked away, shaking her head at how trusting this dumb woman was. She thought to herself [reassuring?]: Yes, it'll all be great again, just as The Witch promised...Step-mother entered her life [..............] is a story for another chapter...."
"...Marcus stared at the locket, longing for Cecelia. He hoped it would have lit up by now. But the locket never lit, and it never would. He turned his gaze on the infinite maze, it's winding paths stretched out to the horizon, like the hairy back of some green giant. What would it take to clear such a maze, Marcus wondered. If he could shave down the hedges somehow, maybe just maybe he could still find Cecelia. A fire could burn it, he thought! But no... the smoke would be unbearable and surely would take his life, or worse... her's. There was no way to clear the maze. Nothing that could be done. Cecelia was surely lost to Wonderland. Marcus turned away, soul kicked like a dog by his own failure to save his true love. Cecelia had raised his girls had her very own... both of them. What a wonderful woman she was! What a tender and l loving soul. What would he tell those girls when he returned? His beautiful girls. And then the most tragic of thoughts occurred; What would he tell Ella? That he failed. Yes, this was his responsibility and he would take whatever heartache that would result. He only hoped she could forgive him someday."