It's clear who the main character is and most people care little about side characters especially when it's just a bland vanilla girlfriend stuff. When we have so little content with the Aunt and can already go town with vanilla girlfriend, sorry but it warrants criticism.
Speaking as someone being part of the never-had-a-girlfriend, single as fuck, hentai enjoyer who does get the appeal of Netori, I welcome such 'vanilla stuff'. Myself contributing to the 'lonely-pandemic statistic', I have no gripes with this pandemic, and I actually fantasize & wish for more such things that probably shouldn't be in a porn game, or in this game about netori, you know, asking for lovely dovey vanilly thingy might be out of the ballpark. But adding meaningful stimulations such as planned pregnancy, raising a family or raising kids with a lovely wife while going through phases of love and distancing each other, arguing (over minor disputes) and then making up again, and when peace returns you start to romantically and sexually pursue your wife/life-partner again even when your sexual interest for her fades away but you know it would happen and you know also how to re-ignite that flame, just like love, and she loves it when you do it, too.
But yeah, cucking your uncle through your aunt is hot. (In fiction)