Logan first kissed Jean—without consent, mind you, though she seemed to give in—during the New X-Men era in Uncanny X-Men #394, which was published in June 2001.
Months later, in New X-Men #117, published in October 2021, Jean goes to Logan for support and guidance regarding her marriage. The panels below, which occur one immediately after the other, indicate that, again, he grabbed and kissed her, and she surrendered to it due to both her vulnerability in the moment and her attraction to him. Then, he course corrected because he knew it was wrong to capitalize on her despair over her marriage. That’s my take, at least, which is supported by Jean’s dialogue immediately preceding the kiss, which makes it clear that she was preoccupied with Scott: “...And you’re my friend...and I wish [Scott] would just hold me the way he used to. I wish it didn't matter. I feel like an idiot.”