I’m just doing a cancer check, relax.
October is breast cancer awareness month. Years ago, my bride got some strange looks when she was asked if she was doing monthly self-examinations, and she replied that I took care of it for her! However, jokes aside, you can do this for your bride, and you may actually be able to do a better job than she can do because you can better reach all areas with the same hand.
This video gives you good information without any breast nudity. The laying on her back part of the exam is more critical than when she is upright, as gravity helps to flatten the breast and make it easier to find lumps. The exam should be done at the same point in her menstrual cycle each month, as breast tissue changes throughout her cycle. I’d suggest ten to fourteen days before her period starts as this is a time when her breasts are the least tender. Having her raise her arm over her head (same arm as the breast you are checking) is important. You can also place a small pillow under her shoulder blade to make it easier – just do it the same exact way every time.
If a breast exam acts as foreplay for your bride, that’s fine, but don’t expect that. If it is likely to lead to sex, be sure it is done before any foreplay since arousal causes the breasts to swell, and that will change what you feel.