Like the others said just play it by ear and let her take the lead.
Ethan is showing some signs of being interested. Last weekend he was brilliant and used the potty all weekend with only one accident. This week has been a different story and he doesn't want to use it at all so I'm just letting him go and we'll try again when he wants to. She's still so little so don't rush it, if it doesn't work out then try again later!