Very recently I come across this term OCD. As given in your example, I have seen few ladies, who are very much obsess to cleanliness. I know my friend from childhood, she used to clean her room almost everyday, that includes her wardrobe and book shelves. I did not know this term OCD at that time, but I was sure, it was abnormal. While keep discussing about it to her, I got to know, that mainly arouse to her from her mother, who pestered her about cleanliness from the very younger age. Since she was so much appreciated by people around her for her organised room, she found that to be right and used to clean and keep things organised everyday. She can't bear with anything that is misplaced in her room.
When she got married, she had few arguments with her husbands regarding the same. Since the cleanliness is considered to be positive criteria, her husband too adjusted with her behavior. Now she is a mom of two kids, One toddler and one infant. As every young mother undergoes, she also spent tiresome days and sleepless nights with her kids. Managing time to cook itself is become difficult, so to satisfy any of her personal time became a dream to her. More than post partum stress, she has undergone this OCD stress by seeing her messy room. She has appointed maids, still she couldn't keep things organised as before . Now understanding her scenario, she realized letting go things as it is and care free nature can keep her healthy and relaxed.
So from her life, I learnt, sometimes, the change in health or change in life style, can make them to realize themselves and come out of this OCD. If family members found that in early stage, they should help them in bring changes in their practices.
Also I think, it all starts with false appreciation of family members. thinking that they encourage the kids' good behavior, they are forgetting to set limits to their behavior. Any continuous practice becomes habit and too much of it becomes disorder. Family should always observe their family members activities, and have to speak out, before it is too late.