I work for a small business and am my boss’ PA. We work from her home office. There is obviously no HR department or anything like that. My boss has “joked” several times over the past year that I’ve worked for her that if I ever tried to leave she wouldn’t make it easy for me. I’ve now been offered my dream job with a large corporate company and when I told my boss she said she wouldn’t be able to give me a reference. How do I explain this to my new job? Will they withdraw my offer? I feel sick about Monday morning now.