No. When you have stabilisers your turn the bars right to go right. Without them, you turn the bars left to go right, so she would have to re-train her brain when changing from one to the other, and probably crash in the meantime.
I know this is a very expensive suggestion, but in case you can afford it:
I was down the local electric bike shop recently. A couple came in and wanted a bike for her (middle aged). She hadn't been on a bike for years, but she was persuaded to try a range of bukes. She seemed OK on them, but she wasn't happy. Finally, she tried the £3100 Gocycle, which is small, very light and has completely automatic gears. It's also very docile in the lower power settings. She loved it, bought it and went away happy.