IMHO, to earn a genuine incest tag the MC has to engage in sex with a family member i.e., sibling, child or parent/grandparent. Those are a given but would also apply to parents siblings (aunt/uncle) and their children (cousins) as well when the MC is directly involved with a blood relative. THAT is true incest and I find it in poor taste. If that is your thing, there are plenty of games out there with that kind of content. Now... step parent, step sibling, step child, roommate and other non-blood friends/relations are fair game and are not actually incest. No blood bond, no incest. It's that simple. I never considered an MC getting with two sisters or mother and daughter that are not blood kin with the MC to be incest from the protagonist's POV. MC having sex with a half sibling is technically incest but I've played that angle in game before... reluctantly... But, I draw a hard line on incest and ntr when choosing new games to try. (BTW: Having another lady join you in the bedroom with your primary LI is NOT ntr as long as everything is consensual. Just no other guys... like
ever.) Personally, I am not into sex with mom, sister or daughter even though I do like to be called Daddy, Papa or a few other choice names when asked for such input in game. Most commonly, I type in Beloved or Darling as how I prefer to be addressed... That's just me.
The MC in this game does not have sex with any of his own blood relations. He does hook up with both mother and daughter as well as sisters. But, he is not related to any of them. So, should Long Road Home have an incest tag? Absolutely not! Not IMHO. I would love to hook up with sisters, especially twins and the mother daughter thing was hot as well. Just as long as it's not the MC's sister or mother I'm fine with it. Consenting adults will do what consenting adults will do! Haha
I'm not trying to win anything here or belittle anyone else's opinion. This is just my humble two cents worth opinion. But, that's my story and I'm stickin' to it!
Adventure ever on my friends, Phat