Definitely not. Fanfiction should be a creative exploration that stays within the bounds of respect for the source material and its characters. Forcing situations like this not only undermines the integrity of the characters Sasuke and Sakura but also reflects poorly on the fanfiction community as a whole. We should aim to create fanfiction that enhances the understanding and enjoyment of the original work in a positive way.
It's not appropriate. In the Naruto world, Sasuke and Sakura are characters with their own personalities and story arcs. Forced scenarios in fanfiction violate the respect that should be given to the characters. Also, it can make many fans who love the original story uncomfortable, as it goes against the positive values that the series often promotes.