The brief wondrous life of Oscar Wao, What was Beli's foster-mothers name, and what page number?

I took a look at chapter 3 but can't find a name mentioned. The narrative begins in 1951 when Beli lives in Baní in the Dominican Republic with her aunt-mother La Inca. Before this, Beli lived an awful life with an adoptive family, but the two do not discuss that time.