Feeling hot all the time could be attributed to many different causes. For many women increased body temperature can begin when they go through menopause. However, this is by no means that only reason. Other typical causes are lifestyle, diet and medications.
For instance, you mentioned that these episodes occur after she takes a shower or drinks wine. Both of these are very common "triggers". Wine (or any alcohol) tends to thin out the blood and because thinner bloods moves closer to the surface of the skin, the person fells much more warmer than usual. Blood thinners, blood pressure medicine, as well as other medications can have this same effect. Also, other medications, particulary those that work on brain chemicals, can cause hot flashes. Other foods and medicines have also been known to cause this problem. Here are a few of the things to avoid:
Alcohol (as mentioned), caffeine, nicotine (smoking), diet pills, hot rooms or enivirnoments.
There have also been studies done that suggest hot flashes (or increased body temperature) are much more common in individuals who don't sleep much. So, another tip would be to make sure she gets at least 8 hours of sleep every night.
There are a wide variety of medications that could be causing this symptom as well as other medical conditions. However, since you brought this up to your family doctor, it appears that the best step to take would be to avoid any potential triggers. Although the article I am pasting below discusses "hot flashes", it nonetheless has some good tips and advice.