Lily Aldrin (Alyson Hannigan) is a kindergarten teacher and an aspiring artist. Lily was originall engaged to Marshall before they broke it off for her to try and be an artist in California. However, she returned to him after her fellowship ended and the two quickly married by the end of season two.
There are certain things in life where you know it's a mistake but you don't really know it's a mistake because the only way to know that it really is a mistake is to make that mistake and go, "Yup, that was a mistake". So really, the bigger mistake would be to not make the mistake because then you'll go about your whole life not knowing whether it was a mistake or notLily
Ted: Look, this woman could actually be my future wife. I want our first kiss to be amazing.
Lily: Aw Ted, that is so sweet. So you chickened out like a little bitch?