This isn't Aaron's story.
Even if it was his story, he didn't just tell his then-girlfriend he didn't want their baby because he wasn't ready, he actively participated in humiliating and degrading her so he could deny his responsibility, then years later -- when his child was an adult and her mom dead -- decided to interfere in her life due to some sort of guilty conscience (and possibly goading from her grandparents).
If he'd left well enough alone, he could have been the good guy in his own story, but he gave up that chance when he played with fire and brought his wife along for the ride. She may stay with him, but now she knows there's a side of him to fear. And if Abby ever becomes involved with her kids, eventually they'll probably hear some of the story, which will likely cause him some grief.
That said, he's still an important cog in this story, since his interference is the catalyst by which Abby's internal conflict is ... significantly reduced.
So yes, he's a side character whose life after Jessica apparently wasn't all that problematic, but as a character in this story he doesn't get a pass for that.
these Aaron side story part as a Teenager did was just all cover for his Future when it comes to Reality Situation here his reaction was normal and surreal, and you know jesicca story (abegail's mother) she is vulnerable and clumsy just like her daughter end up tempting the guy, he was also a victim to that part, you were suppose to enjoy your teenage life going out at parties and one day you realise you got someone pregnant....she didn't use protection or.... a guy condom has a leak or.... was it they are too drunk in those moments to realise they end up using raw.
yea basically his life went down to hill when ur in that situation you could lose your scholarship or even social status, you will end up serving as fast food job
aaron choices was either to convince jessica for abortion which jesicca "disaprove"
aaron options are only left with was to ruin jesicca reputation first before the rumor spread before either of them went down or her's (probably aaron's family or friends suggest)
that ends up her disregard in that situation and ended up saving his own skin. he probably barely even know her, at the party they usually introduce themselves but not all of the guess just the person they approach with.
aaron got struck in real life situation there that end up destroying jessica life by bending the truth with a lie. proclaiming the father could be anyone. and the story goes on. Perspective men that's what makes the story like these are great.
If Aaron did accept the situation, he would be taking Frank's place/position by sheer luck. Consecutively, they happened to get a lounge during that time, and he married Shannon or other family he can reach if its Aaron so Abby could have a mother figure after Jessica's tragedy (since Frank couldn't handle taking care of Abby alone while also finding the financial means to shelter them). Another stroke of luck occurred when they received a will, some money, and a cabin from a wealthy family whose daughter had killed his wife, with the mother, Mrs. Lastoya, sympathizing with the tragedy. (these are not normal encounter, that's why it's called "sheer luck")
but imagine that life if aaron didn't get frank's luck, it could have been different story. they didn't meet vanessa and beth a wealthy family and aaron having different job in mind so yeah.....,
aaron could have a stable life and house a future just like now in the game
(extra) we don't know franks first job before..... he always tired when he returns home
i kinda forgot what his current earning job now but you get the jezz....