No just no
Having Bipolar and in an episode can make a person WANT to do things but unless that person is completely utterly delusional then she made a Choice. When I’m hypo I want to buy buy buy things , but I have to remind myself it’s irresponsible. It’s a choice.
She can blame Bipolar all she wants but nope nope nope
Is she in treatment for it?? If so when she started to go up into a hypo/Manic state she needed to be responsible and get with her Doctor for additional help medication wise and see her Therapist.
Just a side note , since this happened you might want to be checked for STD’s because this might not be the first time she’s done this.
I’m very sorry this is happening to you. You might want to consider seeing a Therapist yourself to help you process what’s happened.