It definitely sounds like some boundaries were/are being blurred. Any type of sexual behavior is not ok between a client/therapist. Even if the therapist gave you her number, it is up to her to set the boundaries. Not you. It doesn't matter if she is not your therapist anymore. It is not ok. You should report any/both of them. I'm not sure who you report them to but if they have a supervisor or a clinic that they work for, I would start there. If they were a court appointed social worker, I'm sure there's a public board of health or something. Reporting them will prevent their misbehavior affecting anyone else.