Whatever you have done for a woman (especially an immature person) will be forgotten and fades with time.

One moment of displeasure (anger or hurt) can render past deeds invalid, so don't expect honour in deeds. Never assume what a woman want now or in the past, is a permanent desire. When there is no longer dependence, good manners disappear, and so does respect - for hope and desire remembers but gratitude forgets.

People tend to forget the favours they received and imagine they accomplish success by their own merits. Human beings are inherently self-serving. Privileges are mostly invisible until they lost it.

Men are more ready to repay an injury than a benefit, because gratitude is a burden and revenge a pleasure. – Tacitus

Would u put in too much faith in mankind?