The infant was born one month premature at 6.06am, weighing 2.78kg and requiring neonatal care.
Bayer said she set up the page to help her younger brother who is unable to work while he grieves, and cares for two boys and two older children Bailey and Keirsha from a previous relationship.
"While grieving for his beautiful wife this loss has left Lovan, a widowed father, unable to work and will put pressure on him financially.
"Funds will be used to ease the financial pressure of living costs as well as additional expenses while Axl remains in NICU."
A memorial service was held for Abby on Friday at the Mt Wellington Community Church.
A death notice said the cherished mum and caring stepmum was surrounded by family and friends when she died.
"You will be missed dearly Abby, rest in peace."
Lovan and Abby Davies were married in February.
To donate money, visit the family's Givealittle page.