Is a daughter's inability to fulfill her mother's repeated requests due to extreme fatigue, or her feeling of intense distress from her mother's constant nervousness and imprecations against her, considered an act of disobedience (ʿuqūq)? And does this affect her relationship with her Lord and her fear of the future?

The rights of parents are great, and being dutiful to them is obligatory. Obeying them in what is good and permissible is binding, and disobeying them (Uquq) is forbidden. The extent of the forbidden disobedience is that which causes non-trivial harm to the parents by custom. Obedience to parents is obligatory in what they command of good deeds, even if it is difficult, as long as it does not cause harm to the son; in that case, obedience is not obligatory. It is obligatory for a person to obey his parents in matters that do not involve disobedience (to Allah), even if they are disobedient (Fasiqeen), provided that it benefits them and does not harm him. If the matter is difficult but does not harm the son, then it is obligatory; otherwise, it is not. If there is a shortcoming in dutifulness, seeking forgiveness and repentance is obligatory, and Allah is Forgiving to those who turn to Him repeatedly.