Ex-girlfriend invited me to family party, her parents probably won't like me being there but she says it's fine anyways since they'll be occupied?

Her parents just don't like guys over at their house who aren't boyfriends, which I experienced before we got exclusive lol. I think it's a pretty positive sign that she's inviting me over to her house but I'm not sure what to do?
Ex-girlfriend invited me to family party, her parents probably won't like me being there but she says it's fine anyways since they'll be occupied?
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