The following sentence is from the BBC web site. It is about violence against women in India.
"....There is no support system, few shelter homes and the compensation awarded to abandoned women is a pittance - often in the range of 500 to 1500 rupees, which is not enough for a woman to survive, leave alone feed her children."
The expression "....leave alone her children...." draws my attention, because I think it should be "...let alone feed her children". Since it was written on BBC web site, I needed to double check.
I checked the dictionaries, yes there is a phrase "leave/let someone alone", but it means something different.
Am I right in thinking that it should be "...let alone feed her children". in this sentence?