I think Aaron definitely feels love and affection for Seb because he’s his dad. I think I’d be fairly horrified if I didn’t think that was the case. Aaron consciously took on raising this baby, and chose to raise him, and I genuinely don’t think he would have done it if he didn’t love Seb with all his heart and soul.
That said, I think also narratively it’s been made pretty clear that Aaron loves Seb a lot and just really sees the four of them as a family unit. He routinely chooses to spend time with Seb, he said multiple time that he and Liv are his priorities, he was the one who suggested Seb move into the mill, etc etc.
I honestly am not sure how much more explicit the show can get without just straight up placing Aaron in front of a camera and saying “I love and cherish this child very much, he’s my son”
i am sort of in love/awe of the fact that even now aaron and robert’s relationship has obviously matured and become more healthy, there is almost always this under currant of like … sexy lust between them like? yes they can stand at a bar looking all normal but in reality they just want to rip each other’s close off 24/7 still and that’s beautiful tbh.