Whatever you do don't lie for her. If she drinks heavily in the evenings chances are she's over the limit to drive in the morning. We've been there recently with a now ex colleague of OH. OH was convinced she was telling the truth about her drinking, I wasn't. The odd phone call to help out with something she couldn't manage became several calls a week, then every day. Her boss caught her drinking at work, she went to a support group totally legless and all the time was saying she had an odd glass of wine once in a while. Last time she turned up for work drunk her boss called the police. She's now without a licence, a source of income and looks 152 not 52! Last time a friend saw her she was clearly drunk at 10am. Sorry, but if you help her to hide from this IT WILL GET WORSE. If the authorities contact you tell the truth (all of it). OH's ex colleague's children (teenagers) had coped with the situation for years but the last time they had to call the paramedics because their mum was unconscious they gave up and moved out to live with their dad (didn't even tell her they were going). The daughter had previously failed her gcses because she was spending all her time running the house while her mum drank herself into a stuper. This is the sort of thing that happens when people believe that a drinker has things under control.