In my experience, there is nothing that tastes EXACTLY like an analog smoke.
That being said, I'm a big fan of "Tobacco" flavor, and I have a few favorites.
Totally Wicked's ORIGINAL Marlboro (M'boro) flavor is great.
(note, that's the ORIGINAL, not the "Patriot Range" which is WAY different.)
MyFreedomSmokes CAMEL flavor is very good, but it MIGHT be too light a flavor for her. It's a very personal thing. If she is a heavy smoker, a stronger (24 or 36mg) strength might be more "satisfying" than a milder 18mg strength.
(for instance, I vape 24mg at work, because there is little opportunity for me to vape discretely. At home, I vape 18mg to help in my efforts at reducing nicotine intake)
I keep note on everything I vape.
Here are my notes on the MyFreedomSmokes CAMEL:
"Camel: Interestingly, the juice itself is a very faint, clear pink color. This flavor compares to TW M'boro in the same way an analog Camel compares to analog Marlboro cigarette. Their Camel flavor is mild, pleasant, "dry" tobacco flavor, with a pleasant "dusty" texture. Fresh and clean, and less sweet than M'boro or other heavier tobacco vapes. I find it to be very pleasant, and find that it makes an excellent "mix" to tone down other flavors which may be too strong. Another way to say that, would be that it does equally well by adding a few drops of a stronger vape, when you want to change up just a little bit. It will "marry" well with those other flavors, so they complement each other, without competing. It's clearly a winner."
Hope that helps.
-berk