I have a question about harvesting and donating eggs?

my aunt wants to have another child but has her tubes tied.. shes almost 44 and asked me about letting her use one of my eggs so it can happen before menopause.. i dont think i have a problem with it but shes worried how it will affect me.. i wont be carrying the child so i dont think i would mind it.. can you give me your thoughts and if you kno of any side affects from this?? thanx