If this woman proves to be more of a nuisance in the future it is possible for the police to push for an interdict (Scottish for injunction) or if the hubby can afford it, civil action can be taken.
Most people would not want to either ignore a Scottish caution or an interdict because of the penalties.
And because you are a lone female with a child the police will be sympathetic to your own and your child's vulnerability.
Also from what you say, your evidence can also be used in conjunction with evidence from the Co Op staff. The incident no longer is an isolated case in any way and adds further weight to a prosecution. She may be known to the police already and have charges against her of a similar nature, pending.
You could simply ignore it but you just don't know if you will bump into her again. If she lives locally, then it may not be possible to ignore her or avoid her. Thats why I suggest that you report it to the police and have it formally recorded in their little book.
