I doubt she'd get sunburnt, tanning salons tend to allow only relatively short exposures
to UV. And the risk of any type of damage is also reduced by the fact that it
is quite natural for most skin types to tan to some degree. In fact some
would consider the vampire look just as unheathly as a constant deep tan.
There are also different levels of tan, from (on caucasians) light brown to a
light shift from the color of unexposed skin. Depending on the time she wants
to pay for, she can get a very nice looking tan without it being too much.
myputer, if your husband is the type to like the look of tattoos, piercing
(beyond just the ears), or other types of body adornment, then he will
probably also like tan lines.
If you're really not sure, get one half completely tanned, and the other half
with tan lines - and invite him to "evaluate" which part he like better.
Or go all tan, and get some jewelry (like a waist chain) that still provides
a contrast for him to appreciate.
The best advice I can give is, get what makes you happy too!!!
If he has half a brain, he will already be thrilled that you want to
be sexy for him, if you are happy about it too, that's an extra bonus
for both of you to enjoy.
Whatever you decide, GOOD LUCK!