Maybe they were too much in shock?
Also, the mother wasn't exactly affectionate in the party like they have an image to hold up as so called Alphas. and of course now that Riku has turned out to be an omega, there's even less affection.
Ohh I remember that scene, your probably right and agree with u in that, I just thought like even tho they found out that Riku is not their true son like umm show some you know but yea they might be too shock that they can't process plus the secretary of the seme talk about their (Riku's family) company being like in worse state condition so that probably adds up to the situation, there's just part of me that thinks that Riku kind a like be a payment or smthg for their company to be ok even tho his parents didn't mean to do that,, I hope in the later end that Riku's parent (the alpha ones) kind a have a reunion or smthg but maybe that will not happen since it's like not the umm of the story
I'm not really expecting anything, but that would be a nice touch to the already steamy story
the parents when the moment they know that Riku's not their son...... why tho like I think that part was like just I mean did they not like raised Riku for 17 years probably really the status of being what u are r probably important in this story anyway I though it was completed this is worth wait if ever and i'm willing to wait (▰˘◡˘▰)