Comment by someone on Lust Geass - Vol.2 Chapter 10

yes

Only because they are hiding it from Rikka.  If he got the consent of both girls, it wouldn't be cheating.

By the way, adults date multiple people, and sleep with them...  A committed relationship, where two people agree to only be intimate with each other, would be different.

Problem is this guy is too imature to be honest with Rikka, and other chick is getting off on the NTR scenario...

Bro normal guy we already understood you vision of this manga about communication and consentement so now please shut the fu** up let us say what we want