Look at Jada’s head. NO ALOPECIA.
To the topic, no normal man could ever accept his wife getting laid by another guy. Will feels shame.
Like a lot of black women, she appears to have a high forehead and that's why many black women wear wigs or extensions or forward leaning hair styles. You can clearly see where the hair line starts. Then again, she might have extreme thinning of hair which some women do experience. I've read that's a form of ALOPECIA when the follicles get smaller with every growth cycle.
It's a slow process for women compared to men whose follicles die off or can only produce mini fuzz like hairs. Yes, I have developed Male Pattern Baldness in these latter years. Mine is front hair line recession rather than crown balding.
Bottom line: Jada can afford the best hair dressers in Hollywood. She didn't have to shave her head, other than for attention.