Mums, if you find an usual number of men's numbers in your helper's diary, is this something you would worry about? How would you investigate? Or would you just question her?

Agree with Jamie about not intruding your helper's privacy. However, I understand that you are all for safety and being cautious. For now, just keep on observing if there's a change in her attitude or the way she behaves because you wouldn't want her to have a poor performance at work.