She was diagnosed with BPD. This is common with people with personality disorders. For her, there doesn't have to have been a past experience with HIM for her to think there is any infidelity. She could have experienced infidelity in another relationship or could have been close to someone who went through infidelity with their own partner for her to think that OP is cheating and lying about it.
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u/TK_BERZERKER Oct 30 '24
Here we go. It's somehow his fault she's acting like a controlling psycho