[header] How to admit the truth over the phone [title] Write down what you want to say. [step] It helps to get it all out beforehand so you can feel more prepared. Try writing down shorthand notes of what you want to say, or write it out word-for-word and read it when you speak to them on the phone. 
Even if you don't stick to your " script " when the call actually happens, you'll at least have a reference point so you don't forget to say anything important. [substeps] Don't just write down the facts, or confessions.