Since the emails were not technically sent from your computer, it would be very tough to do after the fact. The browser on your machine was merely used to instruct the HTTP server at Hotmail to send an email on your behalf.
If you're interested in future monitoring (we monitor what the kids do with the computer to make sure they are divulging personal info like credit cards, home address, etc or going to prohibitted sites like KTM.com) then I would suggest http://iambigbrother.com
not sure if hotmail does, i know its an option in yahoo mail. if you really want to keep track of your email its best to set up outlook or eudora on your system and use the pop email server your ISP should be providing.