complications

I have been dating this girl for about 1 month. About a 2 weeks in she starts saying she loves me I told her to take things day by day. I enjoy her company have a good sex Life everything was pretty good I thought. There were times when we talk about things that bother her or me and yhea feelings get hurt a bit but I thought that’s what relationships are problems happen and you talk about them. We recently had a conversation where she asked if I ever wanted to have sex with other girls I said yes I wanna have sex with every girl I find attractive. And she did not take this well at all. She claims she can’t trust me anymore doesn’t know if I love her. And then she mentioned to be that she was open to having an open relationship in my end so I would be able to go and sleep with other people. Is this her testing me, or is this a way for her to breakup with me by opening the relationship bringing in another person and when/ if that happens she then uses that as a way to end things.