I've been married to my darling husband for 5 years, and I've pretty much been cheating on him for that long as well.
I know people will hate me for this, but I stay with him because he's sweet and makes good money. I love sex, and cheating on him is such a thrill. I do genuinely think I get off on being secretly cruel and taking as much advantage of him as I can. He even paid for me to take a long weekend mini-break a couple of months ago thinking I was with my friends- I was actually just getting filled with cum the whole time. The third guy I slept with that weekend I phoned my husband while he fucked me (slowly and quietly). Hearing my husband tell me that he loved me seconds before I felt my man spurt in me was probably the most incredible feeling of my life.
I have never given my darling husband a blowjob. I made up a story years ago about an old boyfriend forcing me to and now it's just too hard for me, and he completely fell for it. It makes it SO much hotter when I kiss him when I get home after having lovingly sucked off a guy and felt his sperm fill my mouth. I sometimes wonder how much of it he tastes.
I also like him to give me lots of oral sex for me though, which he does with love and care thinking I'm his world and loving wife. Little does he know that the times I come the hardest when he's licking me out are the times when I've come home after getting fucked. I usually wipe most of the guy's cum out after he finishes so it won't be TOO obvious to my darling husband that his loving wife is cheating on him, but I'm still fairly juicy for his tongue when I get home so I'm sure over the years he's swallowed almost as much cum as I have! (well ok, maybe not THAT much, hehe)