They may need to see a doctor, as this could a medical issue.

It's all in your head. The "stink" is what you think about her deep inside. What happened last week? Did you catch her bouncing on your brother's lap or something?

This is a medical issue, most likely imbalance of hormones. Excessive showering and deodorants can make it worse. But can also be caused by body's reaction to laundry detergent, perfume, deodorant, shower gel or lotions. Either way it needs a medical attention. F her life

This is when you call a doctor to see if there’s an underlying issue of some sort. Diabetics can absolutely reek of acetone shortly before going into a coma, for example, or people with thyroid issues, or people with skin issues.

almost guarantee this is a medical issue.

Are you sure she's using soap in the shower? Growing up, my mom couldn't figure out why my brother always stank. Here he was taking a shower, just not with soap. Otherwise, have her see a doctor