If you look closely at Pelosi's words and her body language in her comments yesterday, you get some clear hints about what is going on.
At 4:11, referring to the Democratic caucus, she says "our unity is our power"– for a second, right as she says this, a look of mockery flashes on her face.
This flashing look of mockery occurs again at 4:21, when talking about the results she expects for the Democrats: >>4073137
The uncomfortable and unenthused looks on her colleagues' faces, and these subtle moments of mockery suggest that the words are not quite so true as they would seem. The Democrats did not nominate her "because they are so unified". Something else is going on.
The most telling part starts at 6:35, with Nancy talking about working with POTUS. At 6:38 she hesitates, and looks, up, then grimaces and looks down, before referring to "my power"… This noticable pause and facial complication clearly indicates that there is some hidden emotion relating to her own power.
When we look at how quickly and confidently POTUS suggested Pelosi would be the speaker again after the midterms; compare Pelosi's manner and attitude to Lindsey Graham's; and keep in mind the basic idea that POTUS et. al. are using leverage to make deals and make progress in draining the swamp, then we have a very good framework for explaining Pelosi's ease of victory, her overall air of cheerfulness (freedom), her colleagues' apparent ill-ease, and her nonetheless stumbling at the memory of her own power (no longer independent), and her apparent subtle facial mockery of her colleagues.
I.e. it's happening.