According to Aveiro, the hunky sportsman has been wrongly portrayed by the media.
The affectionate mother said that Ronaldo has only introduced two of his girlfriends to her till date.
"My son has only introduced two girlfriends to me - Merche Romero and Nereida Gallardo," The Mirror quoted Ronaldo's mother, as saying.
"If I believed what other people say, he has been with more than 100 and he is a womaniser. But I know that it is not true. When he likes a girl and the relationship is serious, he presents her to his family," she added.
However, only recently Ronaldo, 24, was spotted with Brazilian actress Karina Bacchi, 32, whom he dated in summer 2007.
The soccer star has also dated Spanish model Nereida after he met her in Majorca, and was also linked to Portuguese TV girl Merche and Brazilian gym instructor called Gabi.