My girlfriend threatened to kill me?

Anonymous

Because I live by myself, have 2 bedrooms, and is virtually never home, my brother likes to use my house to entertain guests if you know what I mean.. I'm always on my brother about safe sex so I keep a condoms in my blue northface bag in the back of my closet for him. This morning I walked in and my girlfriend was there holding my bag, she really caught me like a deer in headlights. Before I could even talk she started laughing uncontrollably and then said very calmly " I'm going to f'ing murder you" . We never use condoms because she is allergic to latex. After vigorously looking through my phone messages, and call logs and searching my house and calling my brother she finally realized that what I was saying was in fact true. Then out of nowhere she just went back to happy, gave me a kiss and left like nothing happened. I'm happy that nothing happened but now I feel uneasy about her threatening me in the beginning.. Should I be worried or is this normal behavior?
My girlfriend threatened to kill me?
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