Her breasts are too large. The structure of the conditions changed between versions and his changes were lost.
Line 1827 of outside.gd is
{reqs = [['race','eq','Taurus'],['sex','neq','male'],['lactation','eq',true],['titssize','eq',5],['titsextradeveloped','eq',true],['titsextra','gte',3]]},
but should be
{reqs = [['race','eq','Taurus'],['sex','neq','male'],['lactation','eq',true],['titssize','gte',5],['titsextradeveloped','eq',true],['titsextra','gte',3]]},
Basically changing the tit size check from equals ('eq') to greater than or equal ('gte').