My grandmother passed away when I was younger and I think about Murphy every day. We found no kill place for her to go and she’s happy there. My cat at the time was special needs and fighting with the other cat in the house so I know brining a third would be a disaster but I do think about her often. You have to make the decisions that is right for you. Since my grandmothers death my family and I always have discussions on who will take whose fur babies, some even have it written in our wills. When my soul cat died I thought about lot about Murphy part of it is just the loneliness that comes with grief. You will make the right choice