Crossdressing in general was grounds for divorce and men could divorce their wives for wearing male clothes too. She didn't even have to be caught wearing them or actually wear them, someone starting a baseless rumour that she did was enough.
Source: Laxdæla saga (the same one where the open chest shirt is ok reason for divorce 'cause it's a woman's garment).
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Crossdressing in general was grounds for divorce and men could divorce their wives for wearing male clothes too. She didn't even have to be caught wearing them or actually wear them, someone starting a baseless rumour that she did was enough.
Source: Laxdæla saga (the same one where the open chest shirt is ok reason for divorce 'cause it's a woman's garment).