You can't kill lust. It is a base human hormonal reaction. I also have a hard time coping with my overall sexual parts. But as much as I find their behavior gross and disturbing, I know that they exist to fulfill and or try to work out our inyamacy issues. I know that I personally (bc of very legitimate reasons )am extremely uncomfortable with physical/ sexual intamacy and yes knowing and or finding evidence that these parts have been out leave me feeling embarrassed, ashamed, dirty, and sick (also a little jealous and inadequate), but I know that they are not trying to harm me but in fact protect me from facing stuff that would retraumatize me. And also preserving my relationship with my SO. Idk that's just me... How does Laureen make your GF feel? One of my sexual parts I know loves my SO as much as I do... it took us both a while I think to not be jealous of each other's relationship with our SO. Guess that's part of coming to terms with the fact that even though we are as different as night and day, somewhere deep down in our core we are both part of one full entity that wants to figure out how to become whole. I also know that other parts don't give a damn about our SO, one is fully gay (so not interested ), another has straight out told him she hates him! Then there are a few others I guess that serve no other purpose other than sex. But I guess they are needed too. If your GF has a problem with Laureen or Laureen is in other ways jepordising your relationship than... I guess if she is unaware, then it is up to you and other parts who are aware to know what triggers her emergence and remain very vigilant and grounded, to block her from coming out. This can take a lot of hard work. On the other hand, if your GF doesn't have a problem with Laureen, then as hard as it is, and believe me I know it can be torturing.... you need to find a way to come to terms with her existence and even maybe be thankful for the role she fills. Idk if any of that helps... I'm a long winded rambler for sure!

but I hope that somewhere in there is something useful for you.
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"The woods are lovely, dark, and deep
But I have promises to keep
And miles to go before I sleep
And miles to go before I sleep"