Actually I thought Jean was having trouble resisting Logan, that's why she said "Don't make me do this". i.e., help me out here. Don't let me do something I'll regret later.
There's a mutual attraction there, but Jean knows that its not love, that she loves Scott and that means more to her.
Yeah , I tought it too , but when i saw the movie for the third time ( now I will stop ... I will wait it on DVD ) , I studied more that scene ... when she said this in the second time she was looking down , because she didn't want to see the desapointment on Logan's faces ... and after this she re - enter on the jet to continue her work ...
I know that Jean is atracked to Logan ... her atraction is a mix of curiosity , of doing something that no one would aprove , of fear , of something dangerous , interest etc. ... but he want her as his woman and she doesn't want it ... because of Scott .
Remeber what they were talking before this ?
(J) I love him!
(L) Do you ?
He questioned her love towards Scott and she didn't like it ... and tha't why she said the famous line about dangerous men and good girls and boys ...
And like you said , she didn't want to do anything she would regret ... kiss Logan ( he was the one that kissed her ... she kissed him back but for some seconds ) was a thing that she shouldn't be doing ... she regreted it in the same moment that Scott said that he loved her after their fight but didn't say it to him ... because he would be upset and they didn't have time to fight there ...
Dany