Leo stared at Ariel with surprise written all over his face, why did she seem different? The Ariel he knew wouldn't just kill without a solid reason, is it because of her child loss? Is that why she disappeared for two months?
So many questions spiralled through his head at once, then he finally came to one conclusion, she probably saw the news this morning, this is his time to strike while the iron is hot.
Even though she tried to hide it the best way she can, he knew her dark side, he had a seen a glimpse of it and all his actions from before to this moment is to make that side blossom into a full flower, a process that is finally working.