No No. It's really simple. Leia has the twins on Dagobah in hiding, with Yoda, Ben and the droids (pre-memory erase) as witnesses. Padme and Leia to Alderaan, Luke to Tatooine. Anakin is informed (lied to) about her death...that's his turning point. (It's very Romeo and Juliet really). He never has to see her die at all, he just has to think she's dead. Sidious can kill her later, after she's lived several years with Leia on Alderaan.