The mother loves and adores her child. However, she and her partner were not prepared 'socially or emotionally' to raise a biracial child and all of the issues that would bring.
http://www.salon.com/2014/10/02/its_not_racist_to_sue_over_a_mixed_race_baby/
Remarkably, I agree (kinda) with Loren: the clinic did not deliver what it claimed it was delivering and really seems to be a shoddily run place. The prospective parents are given a choice among donors and the clinic either needs to ensure that it honors that choice or decline outright, not play dyslexic roulette with donor samples. If they can't even keep ID numbers straight, what assurances are there that they performed all the appropriate screening for the health of their donors--to protect the health of the woman being inseminated and the prospective child? What if they inseminated her with the sperm of her own brother?
Are people who are vilifying the woman who is upset at the donor 'mix up' suggesting that it doesn't matter if she was inseminated with the donor sperm she thought was being used and that as a lesbian and/or a woman who couldn't conceive the 'right' way, she should just be happy she got a baby and shut her trap? Do you also think that hospitals should just not bother putting matching ID bracelets on babies and mothers but instead, just hand out random babies to women who are being discharged from the hospital?