Is it permissible to marry a girl whose mother was nursed by my mother in infancy, without recalling the number of times she was nursed?

Doubt regarding the number of breastfeedings does not establish fosterage nor does it spread prohibition, because the original state is permissibility, and prohibition is only established with certainty. Therefore, if the mother is not certain about the number of prohibitory breastfeedings (five full breastfeedings), then there is no prohibition, and marriage is permissible, unless another reason for prohibition is established. It is worth noting that the majority of scholars stipulate the testimony of more than one woman to prove fosterage.