My suspicious wife

I'm David 34 married to Donna 32 who is afraid I'm going to leave for another woman. Especially when she is pregnant like now she 5 months pregnant. We have 2 children already and I'm very happy with my life and Love Donna very much. But it wears thin when she wants to know every detail of what your doing, like going to bread and milk because we ran out and returning about five or ten minutes later. Then having to tell her who you met or seen while you were out. Anyway I need to get another PA as the my other took a job interstate, he was accepted by Donna because was male. But getting a new PA I realized was going to be urge problem as any woman I hired would suspected of wanting to steal me away from her. Her mother had a very bad experience with her late father many affairs and it was the reason she is like she is I think. But I can't suggest seeking help because she would I'm trying to rid of her. It doesn't help her mother Rosslyn is always bringing up the pass during her visits, Enter Catherine 48 Rosslyn's only sibling and younger sister, she was looking for job never married or had any children. Was a party girl and now the parties were over and her last job the company closed down. She turned up looking for work and she was qualified to be my PA and was staying with us until got a job and her own place. As I knew she could do the job I offered it to her as soon as I knew she she arrived. Not to pack off to her own place as soon as possible, it solved my PA problem. Donna wouldn't suspect her aunt., I thought and I was right Donna thought a great idea. Catherine took the job to see how it worked out, for me it worked out just great, when I was away with Catherine no question on what you got up too with your PA like before. She thought me and my male PA went looking for women went away. But I also found out Catherine really likes sex and fucking me wasn't off the table as far as she was concerned. We were away and attended a dinner together and back to our hotel and on our way up in an elevator she straight pout me to fuck her. I did and we have continued a sexual relationship ever since. Donna wants Catherine to stay with us and not find her own place as she is taking the children to visit Rosslyn after the birth of our new child and I will be busy on a project and won't be able to go. Catherine living with us and being my PA she will know I'm behaving myself. If she only knew I'm fucking Catherine more than her at the moment.