Original: When Jafar is about to turn around - which would mean he would spot Aladdin, she kisses Jafar, but then Jafar sees Aladdin anyway and attacks him. Aladdin ultimately outwits Jafar and has him imprisoned in a lamp of his own (as Aladdin tricks Jafar into wishing to be an all-powerful Genie).
Simplified: Aladdin arrives and defeats Jafar.