I have never received an examination from a family member, but a number of years ago I had to get surgery on my knee. I was escorted to the pre-op area, removed my clothing, & put on one of those open back hospital gowns. I was sitting up on the gurney when my nurse entered the room. I immediately recognized her as the attractive wife of one of my good buddies. She recognized me also. I knew that she worked at this facility, but never expected her to be my nurse.
She took my BP, pulse, temp, & dropped the gown from my shoulders in order to put those sticky heart monitor tabs on my chest & back. I thought that I was going to be OK with her only seeing me naked from the waist up, but after the surgery, the anesthetic apparently affected my ability to urinate & they wouldn't allow me to leave post-op without me having emptied my bladder. She had to give me an ultrasound of my bladder so when she brought in the device, she had to lift the hospital gown from my lower body in order to expose my belly area.
My girlfriend at the time & a young female pastor from her church were also present in the room. I was still groggy from the anesthetic, & I didn't realize that my genitals were now fully exposed for these ladies to see. My GF had seen me naked plenty of times before, but the pastor turned around away from the view. The nurse now realized that there was an audience in the room. She said, "You may want to leave the room now." Fortunately, I was more surprised by the moment than aroused by this situation. I did see the pastor at a later point in time & she did make a comical statement about having to pray for me at a sensitive time in the hospital.
The bladder scan revealed that I had 300-400 ml of fluid in my bladder & the nurses said if I could not urinate, they would need to place a catheter placed into my urethra to drain the urine. They took me to the bathroom in a wheelchair, but after about 15mins, I was still unable to relieve my full bladder. They returned me to the gurney in post-op, lubed & slid a catheter down my penis deep into my bladder. By this time, I had become fully aroused & slightly embarrassed. I apologized to her, & she said, "Its ok, this happens fairly often with male patients." I know that my buddy knows that his wife has seen my "junk" because of needing to be catheterized, but I don't think that she told him about me getting a hard-on while she was handling my cock. It is still a joke with my buddies at the bar that I was "hanging out" with another guys wife.