I am further convinced that Chiyo still has lingering feelings for Ookuma, if only subconsciously, and does not hate and despise him as others have suggested or, indeed, as she, herself, said that she'd "rather not see him again…" If she really did despise him, she would never have clung to him as she did. Indeed, she would have yanked her arm away when he grabbed it. But, no, instead, she hung on to him for dear life.
And just like she did back in chapter 71 when Igarashi thought Ookuma was confessing to Chiyo, she turned the tables on Igarashi and made him out to be an idiot. I wouldn't be surprised if Chiyo realized that she is still in love with Ookuma and wonders why on earth is she spending time with such a buffoon like Igarashi, who she may think she loves, but she clearly does not seem to like. And I wouldn't be surprised if Ookuma maneuvers Chiyo into spending some quiet, intimate time with him on this holiday.
Frankly, if the Chiyo - Ookuma connection doesn't come to the surface during this holiday, I'll be pretty annoyed, regardless of the outcome. Coco has dragged this fiasco on way too long making Igarashi the perpetual unknowing third wheel in his own relationship. Of course, there's the definite possibility, rather, probability that Chiyo will dump Igarashi for Ookuma once she finds out that he spent time alone with Subaru in her own apartment. Since she, herself, cannot be trusted to tell the truth, Chiyo will not believe that Igarashi has no romantic interest in Subaru, and will assume the worst.
And then there's the most apropos line in the chapter: "I should give up on him, right…?" Duh!? Nagatsuki, when you're not off in you imaginary world dreaming about being Ookuma's Princess, you're okay, but this delusional fantasy of yours has gone on long enough!