Since she is conservative, I would get her something more romance focused that she could use on her honeymoon. For example, there are quite a few kits from Shunga and Kama Sutra here that have massage oils and such that might fit the bill. They're tastefully packaged, so no worries about offending anyone.
I do agree about the Shunga kits, but a tasteful piece of Lingerie would be nice. I would go with a white gown. That shouldn't offend anyone. Also, tell her that that is for the honeymoon, so she doesn't open it in front of everyone. There are also bath and beauty product. A bunch of Dona products (on sale buy 3 save 20%) would be great too.
for a wedding present, she is kind of conservative and i dont want to offend her i need some idea
If she is more on the conservative side, i would suggest a nice sexy lingerie set for her honeymoon,and maybe some warming massage lotion and bath oils...stuff geared more towards romance than so much the sex...but thats just my opinion...lol