Interesting point you make.. In my opinion as I am a Sri Lankan..I'll never approve if any of my siblings appear in such a thing... Because if u r still living in SL, I dont think your relatives or friends will ever think its ok.. because still ape kellonta lagjja bayak thiyenewa..
But we have seen SL actresses appearing nude in movies (Not talking about x rated movies here)... Even famous actresses like Sangeetha appeared in that movie with Ranjan where they had some very steamy scenes... but dont think she got much bad rep from it...
And If this SL girl appeared in PB in USA its all her choice..If she is comfortable with it then who are we to judge ? She can chose for herself and she is living in USA which is totally different to our culture.. In Europe this is just a normal thing.. Other than only a handful of Actresses almost all the A-List Hollywood stars have appeared nude in a movie..and sum got their big breaks by appearing nude...So even though its a big thing with us..its just another photoshoot for PB & USA I guess