Sexual Abuse Support Group
Sexual abuse is a relative cultural term used to describe sexual relations and behavior between two or more parties which are considered criminally and/or morally offensive. Different types of sexual abuse involve: Non-consensual, forced physical sexual behavior such as rape, incest or sexual assault, or psychological forms of abuse, such as verbal sexual behavior or...

Sleeping with your shoes on...this makes sense to me. Always be ready to run - that's why I would do it.
I also worked with my inner children so everything you write here makes sense to me. It makes sense that you have inner children who are givng you snipits of memory. It makes sense that you have an inner child who always felt the need to protect your sister. Have you worked with inner children before?
Are you able to get away on your own for a while? Even a half hour a day may help.
You draw don't you? I am sorry if I am remembering incorrectly but I thought you were an artist. If so can you maybe "free draw"? Just let the memory appear on the page. It would be like free writing but with drawings instead.