On our toilet. This is beyond gross and she is 41 years old!!!! We have talked about her getting on her own two feet but she for some crazy reason feels it is okay to stay with us indefinitely. We are currently trying to start our own family and this is adding to the stress. My question is what should I do.?

Edit: thank you for all those giving real advice and not down talking me for asking how to handle the situation. 

About everyone saying she took care of you when you did this stuff, I just want to clarify that my mother did not take care of me. My whole life I have taken care of her. I was put in foster care when I was younger because she did nothing for me and the only thing I carry with me is ptsd from a traumatic childhood. The reason I allowed her into my home is because of the fact that everyone told me that "she gave birth to you. The least you could do is help her out." So i did. My kind heart got the best of me and now I feel like she is controlling me in an unhealthy way and I have no way out. This is only one of the MANY things she does that are not only unhygienic but also annoying .