<human>: Can you provide a brief rundown of the text in within 3 sentences?

Holy hell, I'm not exactly sure quite how to explain this. I'm just going to type it out and hope I am not overreacting but please, please point it out if I am. 

My girlfriend and I were joking about odd porn habits one night and she showed off some sites that she visits on occasion which she states is just out of curiosity. She says she just gets bored when doing things and looks at them but doesn't use them as sexual release and that she is just surprised they exist. Normally, I wouldn't care if she did or not but I noticed a few of them are porn I would deem extreme.  

Some are of raping and women forced to have sex with robots, etc. But my big problem is that a lot of them are webcomics where a mom is taken advantage of by a teenage son, sort of coerced into prostitution and submits to him. The age of the teenager is never implied or discussed but they seem like legal comics since they are on popular, mainstream websites. 

Normally, I would just let it go but she actually has a son who is very young. I am probably over thinking it but I really don't want to get involved with a woman who has a secret desire for incest. Especially since I want to have children with her someday.   

Do I talk to her about it? Am I overreacting? I don't want to accuse her of anything but the incest thing is just a bit much to be curious about.
<bot>: My girlfriend, who has a child, recently confided in me that she gets curious about incest porn and often views it. Am I wrong for overreacting and thinking less of her?