Question About Child Abuse Laws?

When I was younger, my grandmother tried to set me up to be molested by her husband, a repeat sex offender. She had already done this to my mother, but she was about to move away - she wanted to keep his money in the picture & needed someone new. She tried to turn it into a game of having me spy on him while he used the bathroom (without his knowledge) & I remember repeatedly waking up in his bed mysteriously. Whether or not anything actually happened, I don't remember - either we managed to escape in the nick of time or I blocked it out.

My question is what can be done about it? Can she still be prosecuted in any way? Has the SOL run out? (I was around 3 or 4 yrs. when it was happening, I'm 20 now.) What would this even be called? What would I need.

Any help would be greatly appreciated.