FWIW, in other contexts where the risk of injury is unacceptable, I have seen a general consensus on recommendations for the Oneblade. It appears that it's basically impossible to cut yourself, even if you try. So if injury is a major issue, but getting an ultraclose shave and spending 30ish € aren't, you may want to look into this.

Edit: It can be used dry or with lather.

There's an "NSFW" checkbox right above the "Create" button, at least in the default UI. If you're using another app it would depend, but the option is there in all of the popular browser based front ends. I can't change it after the fact. Hope that helps.

First off, massive respect for helping your wife with such a sensitive issue. 👍🏻

Now, if she actually wants to shave with a DE or SE razor, it's generally recommended to start with a less sensitive area than the groin for body shaving. The legs are a really good starting point, alternatively the armpits are also rather tough.

However, in your/her case, if it's just to get a close shave before a laser hair removal... I seriously wouldn't bother with a DE. A basic electric body shaver should be mild enough to get rid of the hair but don't hurt the follicles. Alternatively, there are disposable razors by Wilkinson Sword (Schick in the USA) with a flexible head - means it doesn't only pivot, but actually adapts to the contours of your body. These here are what I mean. Don't let her pay the "lady razor tax" though.

As for lather, I'd recommend a brushless cream, shaving oil or a transparent gel to see better. It might also come in handy to use (shower) mirrors. Best of luck!

Laser hair removal works by shooting the laser at your skin and the hair. You have to have hair that absorbs a lot of light, and skin that does not. So if you have dark pigment in your skin, it will burn

In my opinion if you use a properly hydrated lather, it shouldn’t prevent you from seeing what’s going on.

I’d focus on getting as much water as possible into your lather. Then use as mild of a DE razor as you own.

I’ve personally never had trouble using a DE “down there.” I typically use a Merkur 34C for this and have had great results.

Granted, I don’t have lady bits down there so I can’t speak to those specific difficulties. I have to assume though that you’d get good results with a properly hydrated lather, a mild razor, and a good deal of care.

Is she sure she wants to shave? There are those rolling tweezing things which I've never used and sound like mild torture, but pulling the hairs out by the roots usually leaves things bare for longer, and there's no risk of getting cuts; plus, with such pliable skin in that area, it's probably less challenging to shave.

Or, maybe an electric razor? There are also hair removal creams especially made for sensitive areas, and things like Cyperus Routundus and Oleum Cyperus oils. The linked NIH study says Cyperus Rotundus is as effective as Alexandrite laser.

I'd try a lot of things before I took a razor to my bits.