According to BR’s:
Faerie birth, unlike human birth, is one of the most pleasurable experiences possible. Some even say it’s better than sex, and Maurella’s reactions would seem to confirm this.
Freed from the biological requirements that plague earthly creatures, faeries breed often and quickly. Ever since she came of age 482 years ago, Maurella has been with a number of partners, mostly fae but with an occasional human thrown in for the sake of genetic variety.
Faeries always give birth to multiple offspring. While quadruplets and quintuplets are the norm, it’s not unheard of for litters to number as high as eight. Because they have mixed parents, Andy and Maurella’s children will be half-fae, half-human. Because female faeries breed so often, they usually leave the litter with the father in order to begin seeking out their next mate. This occurs regardless of the father’s species.