best choices on how i should continue after terrible actions

Hi,
Im a teen.Recently i have been felling really really guilty.Ive been thinking abut suicide all the time.And its because when i was ages 12 to 14 i touched mysister while she was sleeping and masturbated while doing so.I feel so terrible about it and ive confessed to my mom because i did to my mom 3 times.She forgave me.I offered to turn myself into the police or move out.

Im afraid of telling my sister because i know it could ruin her life.And i dont want that because i do care for her.But i know if i dont this guilt is gonna crush me.Im also thinking about turning myself into the police.but theres just so many people i love that i wanna be here at home for.

Im a good person now and i treat my sister and everyone with respect and ive never tried to do anything like i did before.My sister and mom are currently happy in their lives,It makes me sick to my stomach.I also let my youngest sister put her tounge on my peanus when she was very young.I dont even know if she was a year old yet but i think she was.I pushed it up against her too.

Worst part is recently i was sleeping with my younger male cousin in bed and left my foot out to see if he would touch it.I dont know why but the thought of it turned me on more than i already was turned on.I purpusely pushed it against his face to see if he would play with it.He did out his hands on my feet.Later on i even let my butt stuck out to see if he would touch it.After a little i felt VERY VERY ASHAMED and im not sleeping next to him ever again.


I know im a bad person.
I hate myself and its hard to live in my skin.

I dont know if i should tell my sister,turn myself into the police,or kill myself.

Please help me.

What do you think i should do??(i dont mind being insulted i deserve it)