GFs past sexploits

I don't know why but when having sex with my girlfriend I ask her about guys she had sex with and she will tell me then I begin to screw her hard until she squirts. When I am having sex with her I get her to tell me details about how she would suck there dicks and let them cum in her mouth.
She tells me she had sex with two brothers at the same time and how one of them fucked her while she sucked the other one off and then they swapped and then they shot cum all over her tits.
Another time she had a 3some with a guy and girl. I love her telling me how she was licking the girl out while getting fucked by the guy and then they swapped and finally he shot his load over both of them.
She just loves sex and hearing her sex stories makes me want to fuck her harder. And when she squirts its totally fucking wild.