Details: Jean Grey and James Logan have a complicated relationship, it all started when James joined the X-Men, Jean had an immediate attraction to him, but didn't take it further because of her dating Scott. As time went by, the two grew closer, especially when her and Scott were drifting apart, Jean confided in James often, specifically during her battle with her overtaking powers, and once Jean found out about Scott and Emma's psychic affair, she told him right away, and he comforted her every step of the way. The two later ended up making love, shortly before her death.
Details: The relationship between Scott Summers and Jean Grey was complicated and caring. In the beginning the two truly cared for the other, and it all started to unravel when James Logan (Wolverine) joined the X-Men, Jean had an immediate attraction to him, which caused big problems for her and Scott, they eventually reconciled, but that didn't last long. Jean's powers started going out of control, and during this period, she gradually drifted away from Scott, leaning to Logan more often than Scott, while dealing with her problems. And things continued to get worse, when former Hellions leader Emma Frost was taken into the X-Men, and was appointed to help Scott better control his powers, and in the process the two began having an affair. Shortly after the two ended their relationship. Though the breakup was messy, the two acknowledged they were both drifting apart, and were better off as friends.