In Season 6 Episode we see that Cersei
blows up the Sept of Baelor, killing high Septons, quite a handful of Tyrell families and virtually all her known political enemies. Cersei also prevents her son, King Tommen from going to Sept of Baelor for obvious reason. There is a good reason to think that King Tommen is under house arrest, judging from the appearance of Gregor Clegane blocking King Tommen from going out.
Upon hearing the news, King Tommen
throws himself out of the window and commits suicide.
Is this the outcome Cersei wants? Lest you think the answer is an obvious NO, I would like to offer the following counterpoint:
Tommen is getting out of control, and being clearly manipulated by High Septons. His presence is a threat to Cersei's freedom and even life, not to mention her political ambition.
And not only that,
Cersei is seen as not crying when seeing her son body.
So could it be that by doing the above, Cersei forces or at least encourages King Tommen to make that decision?