Girlfriend asked for her key back?

Girlfriend of 8 months give me her key to her apartment. Two weeks later she asked for it back and became distant. Nothing else odd has happened and we haven't gotten into a fight. She says she needed the key for her mom but i never got it back after she left.

All i can think is she may be thinking about Her last relationship was very toxic and they moved in together very fast.

Girlfriend asked for her key back?
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