'She certainly doesn't want to play
Other Woman in some conventional, boring triangle. She doesn't feel like an other Woman; she isn't weedling or devious, she doesn't wear negligees or paint her toe nails. William may think she's exotic but she isn't really; she's straightforward, narrow and unadomed, a scientist; not of web-spinner, expert at the entrapment of husbands.
Life before Man by Margaret Atwood
According to the passage, the 'Other Woman' by definition is