Ahaha! XD This was really fun and the lack of goat-girl is such a breath of fresh air.
A bait-and-switch. Turns out, they both came to visit her. That was clever. Well done, little bro. You coerced some honest feelings out of your sister with nothing but good timing.
I pretty sure/hope Unoki heard all of that so we can have a really juicy conversation next chapter.
As for Yutaka...even Toramaru noticed. You're lucky Matsuri's an idiot or you'd have been found out ages ago.