i think gabriella has made it very clear (by virtue of raping her son) that she is, in fact, not lestat's mother because she does not want to be lestat's mother and will do everything in her power to not be seen as lestat's mother
they took a character that uses vampirism to raise above the constraints of womanhood and gender and turned her into "the Mother" and yet we are the crazy ones when we say tvl was a lestat dick riding fest trying to absolve him of everything wrong he has ever done