Spectacular Flameout

My job requires me to travel to Reno on a weekly basis.  I don't actual make it 
there every week, but I would guess I make about 30 trips a year.  I always 
stay at the Peppermill and play in the $2-$4 Hold Em game there.  I'm up 
overall, but have had a few losing sessions recently, including a spectacular 
bad beat last night.
  
After buying a rack and losing about $60 over an few hours I had finally clawed 
my way back up to a stack of about $95 when I looked down in late position to 
see a pair of Kings.  Woo hoo.  I jammed in a raise and bet and raise as each 
card came down.  The flop was great 9-K-J.  Turn was another Jack, giving me 
the second best possible hand, a boat with Kings over Jacks.  The river was a 
6. By the turn it was just me and a 50-ish year old woman who hadn't really 
been playing that well in my estimation.  I had won several pots where she lost 
to my flushes and full houses with a straight or trips.  She didn't seem to be 
very good at seeing the possibility of being beat and reading other player's 
play.
  
After the turn we got into a bit of a raising battle, I think it got up to 4 
bets.  Given her past behavior I was putting her on the straight with a 10-Q or 
a flush (there were three clubs on the board).
  
Feeling bold, on the river I declared "I'M ALL IN".  I had about $45 
or so in front of me.  There was some amazement and "can he do 
that??" questioning.  I knew that at the Peppermill as at most casinos, 
raises are unlimited in heads-up play.  I have never actually seen this done, 
so it was a bit of a fantasy play on my part, and to be true it was a gamble as 
there was that one hand that could beat me.  
  
She called my all in and sure enough, turned over a pair of Jacks to beat me.  
The only two cards in the deck that could do so.  I went over to congratulate 
her, shook her hand, and left the poker room for the night.
  
Alas, if I had lost with Aces full rather than Kings, we would have won the 
$113,000 bad beat jackpot.