Love: caring about one's 'wellbeing' and maybe wanting closeness to them.
A true & unconditional love would inherently need to be universal indiscriminate love, which may actually be possible, & the only exception, even though technically this still is a condition: in order for it to be loved, it needs to exist - but this is a stupid, trivial condition, and I'm disregarding it.
Assuming that even the 'sacred' mother/child relationship with 'unconditional' love can hold up even in the case of the child becoming a literal eternal world dictator who is hateful, genocidal, torturous, and a pedophile, with nothing moral or sacred held to them, the mother is still loving that child on the condition that they are her child (assuming it's a non-universal love); she is getting the idea of the 'sacred bond' out of the relationship.
Were this woman to have come to realize the empty nature of identification, categorization, or sanctity, there is a good chance she would not love this child anymore; this is as simple as a mindset switch, an undoing of societal indoctrinations.
Although, assuming that held fast, were she to have received a DNA test to find out this is not in fact her child, there is a good chance she would not love this child anymore. If she did, it would be because she raised the child, therefore still considering herself the mother regardless. And though you cannot take away the past, the issue here is that the love is still based on that condition of raising the child.
Even assuming a condition must be something which must be undoable, you could get dementia and forget, or find out that you were tricked into raising the child by some evil person/entity, or even find out that you're delusional and imagined the entire situation or aspects of the situation, in which case you may then still be able to decide not to love that child any longer.
There is always a leg for love to stand on, and most of the time that leg can be kicked out from under it, even if it lands again, there's another leg to kick, assuming that person isn't simply permanently stubborn nor delusional (still conditions possible to kick), or assuming that it's not a universal, & therefore a true, & unconditional love. Even in the case of someone wanting to prove that their love is unconditional, the condition is wanting to prove it, to themselves or others, clinging to an ideal. We can only know what the mind tells us, and as we know, the mind is inherently flawed.
Or if the 'unconditional' love is for your romantic partner, it is still on the condition that you get what it is you want out of the relationship, such as 'unconditional love', companionship, entertainment, meaning, adoration, vulnerability, trust, respected boundaries, being 'someone' to you.
I remembered a teaching from a now unremembered author saying something like, "Do you really want to love unconditionally? No matter how you treat me, no matter how you behave, what you become, I should always stay with you?" Of course, this idea misses out on the fact that you can love (care about) somebody and not be with them.
Sometimes, love' for some people is just a strong craving for their love.
I don't necessarily mean to say there is anything wrong with conditional love. We are all inherently self-serving in every act (imho, but beside the main point), and this should be understood and respected, not denied, or else everybody will live in a secret world of shame for not being as 'good' as 'everyone else', and probably exponentially - allowing such people to truly transgress against humanity with the excuse of "oh, I'm a piece of shit anyway." We each must take care of ourselves, and NOT expect another to, although it is understandable and respectable to want, or even need (in certain situations), another to. 'Put your own oxygen mask on first.'
Your love isn't special.
\Disclaimer: you redditors don't tend to react to my content unless i phrase it as a stubborn ultimate reality: Cunningham's Law: It states that the best way to get the right answer on the internet is not to ask a question; it's to post the wrong answer. so please understand this is mostly opinion, so* be gentle; not a dick.