How should we deal with an aunt whose problems recur and who harms us with her actions and words? Do we incur a sin by telling her to postpone an overnight stay? Is there any danger to us from her saying, "Allah is sufficient for me, and He is the best Disposer of affairs"?

There is no doubt that such a situation is disturbing and saddening, and it increases life's complexity and pain. Using kindness and gentleness is one of the important options, as you do not have the power to change her, but you can focus on your reactions and maintain kindness and goodness towards her. Often, evil and harm befall us to the extent that we allow them. Therefore, a firm stance must be taken to prevent transgressions, as kindness and goodness do not contradict setting boundaries and protecting your way of life. You can refuse to receive her as a visitor if her visit causes harm and distress, while maintaining the minimum level of kinship ties. If, after exhausting all means of regulating the relationship, reducing communication becomes the solution, there is no sin in that. A kinship that causes harm and distress should not be maintained. Whoever chooses to maintain ties has chosen kindness and virtue, even if it is the minimum possible level of connection, such as during occasions and holidays.