If my ex-landlord said she will not file an eviction, can she legally still take us to court?

I moved in with a few people about a year ago. I hardly knew them, but moved in anyway, because I needed a place to stay while I went to school. To make a long story short, they were incredibly irresponsible and stopped paying their parts of the rent. I moved out in December. Now my ex-landlord is saying that if they vacate the premises, she will not follow through with the eviction. I have our phone conversation recorded, with her saying that. Can she legally still follow through with the eviction? Or can the recorded conversation hold up in court if she does decide to take us to court anyway?