Any person with 2 braincells to rub together could've seen that coming? If you knew she was coming, maybe send away the half naked lady?! I feel like the author just wanted to force some hijinks in this moment.
Edit: additionally, what is wiping a liquid on clothes going to do? Do we seriously...
I'm not interested in incest and I don't see how this manga goes anywhere other than the siblings either live single forever or get together. The only hope is if the Mochizuki girl makes Tanuki "understand." But the author seems hell bent on making him a sister obsessed yandere for no reason at...