Is there a way to record passwords for websites that are entered by
someone else on my computer so I can use them later?  I ask because I
believe my significant other is not being truthful in our relationship
and would like  to confirm or deny my suspicions.  Thanks.

As this question likely crosses some legal lines I have a feeling you
will not get and answer from a researcher.

What you may be looking for is a keylogger program.

Try Download.com

http://www.download.com/Free-Keylogger/3640-2162_4-10463859.html?tag=tab_ur

http://www.topshareware.com/iOpus-STARR-PRO-Edition-download-139.htm

iopus starr pro,everyone's choice all around the world.


Visual logging - See everything that happens on your PC with the
built-in screenshot recorder. STARR creates an unique  easy-to-read
"all-in-one" interactive activity report.

Text Logging - Log keystrokes, user names, passwords, path names,
access times, windows titles and send the log file by email, all
invisible to the user. Fully searchable for keywords. This makes even
the evaluation of large log files a snap!

WEB Spy - Record all URLs of visited websites. The report can made in
plain text or HTML (just click & browse to the recorded sites). Works
with all popular browsers!

CHAT Spy - Record both sides of a chat conversation. This feature
works with all leading chat software (AOL Instant Messenger, ICQ,
Microsoft Messenger, Yahoo Chat).

AOL Spy - Record IM and chat conversations, emails and other content inside of AOL.

Email Reports - STARR sends them invisibly. For maximum security and
speed the report can be sent as password-protected, compressed ZIP
file. STARR PRO

Network functions - STARR can save the log files directly over a local
area network (LAN) and is prepared for an easy remote deployment.
STARR PRO

Current User Log - Create individual log and report files for each user. STARR PRO

Password Protected - It runs invisibly and maintenance free. The log
file is encrypted and the setup und uninstallation is password
protected.