I mean, if she wanted to be a girl for a while, she probably had already thought about how she would act as one, no feminization needed.
Then again, I get the impression she's not acting all that different from before.
chitose is interested in lewd, but not in NTR. too h-brained and only assume guys invite girls to assault them and she holding out for her man to realize she his
Succubi are quick to recognize opportunities for lewdness.
Also, his name isn't Chitose. It's Chifuyu as written in the furigana for this very chapter. I would have also translated that Shi address as comrade instead since mister sounds too weird for someone calling out for their degenerate hobby buddy.