MICHEL: Now she knows I’ve been hiding something from her. Suddenly she’s asking questions. Why did I leave France at eighteen? Where do I go at night? Who are my friends? What do they do? Where do they live? Why have I chosen this career? On and on and on and on – it never ends! I can’t stand it, she’s a complete pain. She won’t stop. I took a six hour bath last night just to escape the incessant nagging. You did this to me! You turned my Giselle into a mother, and I hate you for it! I hate you very, very much! [leaves]
SOOKIE: So, feel better now?
LORELAI: Yeah, I do, thanks.
Lorelai is jealous of Michel and Giselle’s relationship as both a daughter, unable to spend time with Emily as Michel does with his mother, but more importantly, jealous and possessive as a parent. She has to ruin things for Michel because only Lorelai and Rory can have the “perfect” mother-and-child-yet-best-friends relationship. Sookie’s question suggests that she understands Lorelai’s feelings (although perhaps doesn’t approve of them), and has seen this coming.
The Annotated Gilmore Girls 