Help! I think my grandmas spirit is in my cat!?

I have loved my grandma very much. She was my world. I used to cuddle with her when I was younger because my mom was out stripping and bringging rough looking biker guys back home. Those biker guys used to play chess with me. My grandma would wake up early just to put on barny for me. Those biker guys changed it to movies where people killed each other and girls took off their shirts. My beloved grandma made me plates of delicious breakfast. Well she died because she one of the biker guys took her vicoden and she colapsed from the pain. I cried for months straight. Just recently my cat has been making strange noises and giving me loving looks. It scratched me in the face so I made it sleep outside. I feel so bad about making my grandmas spirit sleep outside. Should I feel guilty?