Welcome to the forum. Rules are to join in and have fun and play nicely with the rest of us kids.
Some brake designs vent gas in particular directions to try to control muzzle deflection, but I think most rifle muzzle brakes I see work primarily by venting pressure perpendicular to the bore axis just before the bullet uncorks the muzzle. This prevents "rocket effect" from gases venting forward from the muzzle. That effect results from accelerating the mass of the powder forward to even higher velocity than the bullet has, same as an impulse rocket engine does, like the blank firing ones the astronauts used to use on space walks (can't recall if they still do or not). Rocket effect can account for over half of total recoil using some loads in some guns, so venting the pressure laterally can cut recoil energy by over half for those combinations.
In general, the heavier the powder charge relative to the bullet weight, and the more pressure there is when the bullet gets to the end of the bore, the more rocket effect there is for a brake to mitigate. This means the brake makes the least difference with light loads, and will help tame maximum loads more.
I mention this because it is not uncommon for fellows to load down ammunition for wives and juniors and to also get a muzzle brake, then be disappointed by how little difference the brake makes to those reduced loads. Indeed, the added blast noise from the radial gas venting is then often remarked to do more to encourage flinching than the small additional recoil they would have had without the brake.
If your wife will use maximum loads, you'll get a benefit from a brake. Just be sure she and anyone standing to either side of her has good hearing protection. Wearing both plugs and muffs at the same time is recommended these days, anyway.