With my wife, we usually have sex most of the mornings but we also love mutual masturbation or masturbating alone every time we need it. We are more than 20 years together and she knows from the first moment that I am horny most of the hours of the day and I use to jerk off several times per day. She loves it and she always tries to make me horny giving me more reasons to masturbate. It's great and totally liberating to have such a loving and understanding wife.
My marriage is now a sexless but loving one after 30 something years so masturbating is my only sexual outlet. My wife caught me at the PC looking at porn and was not at all happy. I think she's now got used to the idea that I do that but remains disapproving sadly...
My wife has caught me masturbating plenty of times (I mostly get an eye-roll) I also masturbate openly while she's getting ready for bed, she does have a nice ass and her panties have a tendency to get caught between her butt cheeks. If we're not going to have sex, I masturbate while we're both watching TV in bed and every once in a while she'll take my hand off my cock and give me a hand-job while she's watching Law and Order. It's kind of an after-thought hand-job, but it's a hand job all the same.