The space opera writer Lois McMaster Bujold has a book - "Captain Vorpatril's Alliance" - about a ne'er-do-well, kinda party boy military captain meeting a beautiful woman who's being chased by assassins from her home planet, and the captain and girl having a very romantic comedy relationship (bickering, bantering, eventually falling in love) as he tries to protect her.
It's a very sweet, funny, romantic book and not luridly sexual but the author also alludes several times to the girl having absolutely enormous breasts and the distracting effect they have on men and women, the physical difficulties they present with putting on a disguise or slipping through a narrow space, etc. Nothing long or involved enough to qualify as erotica but the character is well-written and sexy.