It is your duty as a wife to stick by him and take care of him even though he is disabled but it is also his duty as a husband to be loyal to you. Communicating with other women in that context is emotionally cheating. He has broken his promises so you are not obligated to keep yours.
A strong woman takes advantage of help she can get from people around her but she doesn't rely on them for anything
She uses logic and manages her emotions
She offers help either because it is a business transaction or out of kindness. It is never because she hopes others will return the favour or out of fear of losing them
She has her own mind and thinks for herself and knows that she has to be the one who bears the consequences of her decisions