With her boyfriend Vince Vaughn constantly smoking, actress Jennifer Aniston is finding it difficult to kick the nicotine habit. According to the Daily Express, the actress who played Rachel on the television series Friends wants to quit smoking, but keeps starting again, because Vaughn, 36, is always smoking around her. A source told the tabloid, "Jen's been in trouble with her doctor because she went to him for help in giving up and hasn't. Every time she tried, there would be Vince puffing away. He's not helping in the least and when she tells him off about it, he just laughs." Aniston and Vaughn have been dating since they filmed The Break-Up together in 2005, while Aniston was going through her own break-up with former husband Brad Pitt. | 
