STORY: Angeles Bejar's protest, they said, is over her son's treatment over his kissing player Jenni Hermoso on the lips after the Spain's World Cup victory.
Rubiales' cousin Demeiza Bejar Sanchez said her aunt had become "overtaken with desperation".
Rubiales, who is head of the Royal Spanish Football Federation (RFEF), was suspended on Saturday (August 26) by FIFA amid a furore after he kissed Hermoso on the mouth during the awards ceremony following Spain's World Cup win in Sydney on Aug. 20.
Hermoso says she did not want to be kissed.
Rubiales has been defiant, arguing the kiss was consensual.
Hermoso, her teammates and the Spanish government say it was unwanted and demeaning.