Securing my Inheritance

Short Version. I found out by chance my grandmother I'll called Mary was being regularly fucked by her dog. But the dog passed away, he was old and as I knew Mary liked regular sex and I worried she might hook up with some fortune chaser. I got her a new dog and gave him to her. I had already trained the dog to fuck her, by teaching it to fuck me. I'll called myself Lauren only surviving close relative of Mary. I'm single and not interested in marrying and have short relationships. If I had been a male I would've fucked Mary myself and I know she is getting serviced again by her new pet. Without sex she is very grumpy and since she got her new dog she is happier.