Suspicious Wife

I (48) had a couple of affairs over the years and my wife has forgiven me somewhat, but not totally. Anyway, if I hired a young woman my wife becomes suspicious of her, and trouble always follows. So, I don't hire young good-looking women, but I needed PA and wasn't going to hire a young man. But I saw a good-looking woman 10 years my senior and surprise myself by get a hard-on. I've always thought I was into younger women, but I was wrong. I was into good-looking women, the lady I saw wasn't available as she was a lawyer and a horny one at that. But it was a wakeup call, I could find mature PA with great legs and breasts and my wife wouldn't suspect anything. Easier said than done, first finding an available good-looking willing to fuck her boss woman was hard. But I found one just by pure chance and he already worked for me. All thanks to a sudden rain burst and the I'll call Sally 58 was drenched and her blouses showed her assets and her wet hair laid flat around the head instead of the fizzy mess it usually was and with those awful glasses removed she looked beautiful. Well good enough to arouse my cock anyway. Sally also lived alone and was in fact a loner, kept to herself and did have any outside interests I knew of. Getting into bed with me was going take some thought. But I moved her up to my assistant and she passed the first test. My wife didn't see her as a threat, especially as she was wearing those awful glasses and her hair was fizzy. Sally didn't dress to impress either another plus. I started taking Sally on short trips and then longer trips. Slowly I got close to Sally and after getting her drunk, I fucked her and again in morning. At first, she was remorseful, and I had to get her accept it happens. But bedding her again was easier and after several trips including sex, I had a regular fuck. She was quite willing to please me and last Christmas at my wife suggestion we made Sally our live-in lover. My wife is suspicious not dumb, and she had worked out I was fucking Sally shortly after I had actually started too. Sally is a threat to my wife position as a younger woman would be, if you know what I mean. My wife likes sex and had always wanted to have threesome on her own terms of course. My wife has the comfort of knowing who I'm fucking when I'm not with her. As well as a babysitter for some personal time together with my wife. I'm not as smart as I thought I was.