@ Senpai - Is it because he solved her and Kanzashi's sisterly problem? She did blush after that.
Side note - Not all of the kid's like their mom's.
Chifuyu's daughter dislikes her and doesn't really talk to her. Laura's resents her for never paying attention to her and putting her Shwarzer hase job first. Kanzashi's male child is somewhat bitter that Kanzashi spends more time with his twin sister than him etc etc. In an odd inversion, the harem ending actually fixes a lot of these problems. Maya convinces Chifuyu not to be so hard on her kid. Chifuyu helps Laura take charge, so she has more time to spend with her kid. And Tatenashi spends time with her nephew in place of Kanzashi if needed.