My wife has no taboo about masturbation (although she has taboos about a lot of other things).
When/if she's in the "mood" or relieving some stress, she might just rub one out in bed before going to sleep.
It's a "solo party", and I'm not invited. I don't take offense, it's her "personal sex time." It's actually funny to me to hear her moaning and groaning before orgasming right next to me.
She'll also say that she's not thinking of anything other than her pussy; and I believe her (men usually do think of sex while masturbating.)

She's even done it once while sunbathing nude next to me, legs spread open (no one was around.) I thought she was asleep but she was actually quietly rubbing her clit when I looked over.

It's a bit of a double-standard too. If I was to start jerking off in bed, she would actually be a little offended that I'm not putting it in her lol! Maybe it's also because it's messier when it's guys masturbating. Or she'd assume I'm thinking about someone else's pussy as I'm stroking (which I might lol!).

But all in all, I think it's good for the marriage. She knows she can have her own pleasure without necessarily getting a dick or fingers jamming her.

Very. One time we were coming home from a road trip and she told me she rubbed one out in the back while she was "sleeping"

When my wife and I didn't want to go through with sex we would mutually masturbate. I have no illusions that she doesn't do it when I'm not around. I'm 100% sure she does. I did catch her once when she was on a break from work.
When she came inside the house(we live in FL and she was out by the pool) I kissed her hard, turned her around, pulled down the sweats she had on, bent her over the island and fucked her hard. We both enjoyed that.

Used to be shy.
 

My wife used to be quite shy about masturbation, would be embarrassed to do it in front of me.

Several times I've encouraged her to masturbate in front of some of our friends.

She said she was mortified, but was so hot and carried away that once she got started all she thought about was making herself cum.

Now, often while they are taking pictures of her, they encourage her to play with herself. She now tells me that knowing that they are watching her so closely, and can see her orgasm and totally lose control, it just adds to her excitement and enjoyment.

Here's some shot by our friends of her in action.

My wife does it, but claims to not do it all that often. She gets shy if I bring the subject up, but on other occasions she can be quite brazen about it. I've watched her many times (and she has watched me) and I've caught her a few times too. The day I bought her her first vibrator was a epic day - she mesaaged me at work to tell me how her first 2 or 3 orgasms felt, then demonstrated it for me that night.

A few years ago, met a lady via a video chat with another lady I was fucking. They also played together, and wanted a FMF. First time I met her, she was getting naked and kissing her friend.

Later, we got together by video 2x before we got together in person (lived in different cities). She showed me how she hot off with her fingers and various toys, I showed her how far I could shoot my cum.

Got together with her and her friend several times. The loved to 69 each other while I fucked one of them.

When we got together in person. She would jill off for me between rounds of fucking, girl could cum a lot. I would frequently wake up in the night, feeling her rubbing herself off. Sometimes I'd join in, others I'd just hold her while she jilled. The lady liked to cum.

She said she started early using her fingers, got her first toy from an older gf, and rarely missed a day of orgasiming a few times. Sometimes she call me, from the toilet stall at work, where she was jilling, saying she wished it was my cock instead of her fingers.

God, I miss her

I had to talk her into showing me how she masturbates in private. It was exciting to watch her start with her fingers first, then with her favorite vibrator.

I did learn a thing or two pleasuring her. Instead of pushing in-and-out with the vibrator, she likes it more on her clit and around the opening, where as I want to see her pussy stretched around a big dildo.

We compromised when she has the big dildo, there is a vibrator on her clit. Best of both worlds.

Agree, you learn a lot about pleasing a woman by watching her masturbate.

For many years, she didn’t let me see her masturbate. She didn’t deny it, but said it was a “private thing”. She started opening up little by little; reaching back and rubbing her clitoris while we fucked doggystyle, letting me use her hand while i rubbed her pussy, etc.

A real breakthrough was when i was using her vibe on her and asked her to just hold it while I moved to a different position. She did more than just hold it. She started using it on her clitoris, and then inserted in her vagina without me guiding it.

Like the previous poster, I noticed she tends to hold it on her clitoris instead of moving it around, and when she uses in her vagina it is only inserted 3 or 4 inches.

She realizes how much it turns me on to watch her, and she does let me watch more, even if most of her masturbating is still just her alone.

My girl same way
 

When I met my now girl and now wife. I found she loved sex and never got too much. Times prior to me and in between relationships I asked her what did you do when horny.
She made it clear she used one of her two vibrators, I asked her if she would let me watch sometime she said sure if I can watch you jack off also, of course no problem.

She showed me her two vibrators one looked like a small cock and vibrated the other was small metal one that vibrated with intensity. She made it clear she liked the metal one.
She showed how she used it around her pussy lips pressing lightly. She even let me video her, it was a hot moment.

I decided to buy her one and thought she would like a life like cock that vibrated. I measured my cock length and girth and ordered one size larger that looked like a real cock. It moved long and short and also vibrated.

I gave it to her and she looked amazed at how real it looked. She started to use it and I asked her to put it in her pussy and she started to but made it clear it was too large and would not be comfortable.

She said she liked the vibrator on the outside best for stimulation. She made it clear she was not using the one I got she and joked she may give it to her sister to use.
She did get out the other vibrator that somewhat looked like a cock an agreed to run it in and out of her pussy for me to satisfy my urge to see her do that.
There is something about us guys watching a women take one in the pussy thinking they like that as much as we do.

Officially my wife does not masturbate, although sometimes I see her teasing the clit under the sheets ...
On the other hand, she loves that I dot her clitoris while we fuck, one day I had the idea of catching her hand and putting it under mine, immediately she got into motion and masturbated with ardor, her moaning intensified and she enjoyed a sl*t.
Now I know what to do to get him to masturbate with me