|"Dear << INSERT NAME HERE >>, I love you with all my heart!"|
Basically, it was nice. Just because you have kids does not mean that anything is deminished from the night. Put them to bed at the regular time. Watch Desperate Housewives... It is easy to think that because you have kids you can't go out and therefore the night will not be the same, any you know what, the night will not be the same but it can still be lovely and romantic.
Looking your love in the eyes and expressing your feelings should not cost a cent.