I recently confided in someone but now they are....

Give it time. If you stick to your guns and don't confide anything else to her, and probably more importantly, let her know in subtle ways that you are not interested in her like that. ( By the way, that's incest and is gross), then hopefully she will get the message on all fronts and leave you alone in future. Good luck !

Update:

My worst fear has come true, she's moving in with us in a few weeks. Wtf am I going to do?

dont be friendly. if she asks questions say you dont have time or be upfront and tell her ' i dont need to tell you everything, why do you need to know??' as for the inappropriate looks just glare at her back, dont look shy!

I don't talk to her anymore, don't even look in her direction and that's how it's going to stay for life. I just don't want to be seeing her everyday once she moves in with us. wtf is she moving in with us? She's fine living where she is but no she has to move in with us plus her poo is the worst. She comes to my house and does it and stinks the whole house down, it smells like something died and had been rotting there for years. F my life, one bad thing after the other and this is the worst I don't want to see her every day but I have no say in the matter. If I told my mum what she's like she wouldn't believe me so I'm stuck until I can move out which is never going to happen.

Update: we aren't moving after all, I was worrying for nothing but we will move in the future and the creepy aunt will still be moving in with us. Ugh! Why can't she get her own place?

You might be in uni then?

Girl stand your ground. Show her you’re a changed person and she might forget everything. If not, take her aside and tell her not to tell your mum about it. If she respects it, then fine. If she don’t, speak to your mum privately. Your mums your mum, she won’t judge you for anything.

If you think your auntie is checking you out, then check out that situation. Incest is a no go. You seen game of thrones? Yeh, just no.

Your house, your rules. Don’t let her do anything to you, just be kind and nice so she wouldn’t want to say anything to your mum. As she doesn’t want to upset you since you were kind.
If she tells your mum, then let her know that you didn’t like it.

Why should I be nice to her? Why should I talk to her if she is going to look at me inappropriately? My mum knows everything I confided to my aunt about so there's nothing she can tell my mum that she doesn't already know. There's no way I am talking to her ever again, we're no longer related in my book. Whenever she comes over to my house now I act like she don't exist, when she moves into our new place, I will continue doing the same. Once I'm financially independent, I will get my own place if she really is moving in with us because there is no way I'm living with her forever. I know the best thing to do is to tell my mum but I'm not sure about that, she might not believe me. I'm going to tell my mum today anyway and see what happens, I really hope she believes me.

Why should I be nice to her? Why should I talk to her if she is going to look at me inappropriately? My mum knows everything I confided to my aunt about so there's nothing she can tell my mum that she doesn't already know. There's no way I am talking to her ever again, we're no longer related in my book. Whenever she comes over to my house now I act like she don't exist, when she moves into our new place, I will continue doing the same. Once I'm financially independent, I will get my own place if she really is moving in with us because there is no way I'm living with her forever. I know the best thing to do is to tell my mum but I'm not sure about that, she might not believe me. I'm going to tell my mum today anyway and see what happens, I really hope she believes me.