Or really large pictures- But small ones like that aren't a problem. Great pic by the way- You guys look good! Happy Birthday!
Also you can do an lj cut like this.
<lj-cut> anything after that, and between this closing tag </lj-cut> will be behind the cut. The text will automatically say 'read more' ( I think)
If you want it to say something else, then use <lj-cut text="your text inside quotations"> and the closing tag again. You don't have to be in rich mode to do it that way.