If it was unintentional like a person touching a woman by mistake in the street or elsewhere without intending it, this is not a sin. But if one extends her hand to shake hands, you shouldn’t shake hands or touch anyone.
If it was unintentional like a person touching a woman by mistake in the street or elsewhere without intending it, this is not a sin. But if one extends her hand to shake hands, you shouldn’t shake hands or touch anyone.