There is no seeming relevance to the fact that the alleged abuser is unmarried.
As for the rest of it -- if your mother is unwilling or incapable of protecting herself and your siblings I would bring this to the attention of the DCFS (or whatever the child/family protective agency is called in CA) and make them aware of the situation. If the abuse is strictly emotional and NOT physical there won't be any physical signs of it so law enforcement will probably not be able to become involved. If you have a clergy person or other trusted member of the community in whom you can confide I would try that as well.
It's natural for siblings to be jealous of their siblings especially if they are younger.
J. California Cooper had four siblings.
It is perfectly normal for siblings to fight and to call you or other people ugly. Siblings often say things that they don't mean, especially when they are arguing with their family members.
They attended Montclair Prep in California.
Yes, often older siblings (especially those four or more years older) will be very protective of their siblings. In some families the oldest sibling may have to take on the duty of looking after the younger siblings which is a great responsibility.
Yes he had a sister, Madie Bacon, who lived in Berkeley california
The common name for stuff passed down to younger siblings is: "hand-me-downs." As children are growing fast, clothes especially, soon become too small.
All siblings should be listed as joint tenants with the right of survivorship if your desire is that all siblings own the property and that upon death each sibling's interest would automatically pass to the surviving siblings.
Yes, especially children and siblings.
The rivalry between the two basketball teams led to intense competition on the court.
I know he had a brother Tommy. He was our family doctor in California during the 1950's.
Yes, it was started by siblings Dick and Mac McDonald in California in 1940.