Okay, this may not seem cheerful at first, but just wait. I think this idea explains the words "provocative" and "intimate" that have already been used. Here we go:
Okay, from the last episode she was in, we've seen that Lady Heather can have her unstable moments. I'm still thinking that her granddaughter gets kidnapped, but unbeknownst to the team, it is partly her fault. Heather recently tried to get back into her line of work and stumbled into a shady group. This group includes someone Grissom helped put into jail. When this person finds out that LH knows and is friends with Grissom, he decides to kidnap LH's granddaughter and demand that Grissom be brought to him. Grissom, being involved with the case, goes to LH's house to see how she's coping and once there, LH drugs him. Now, the drugs don't konk him out, but they do make him a little more relaxed and easy to subdue. While waiting for the bad guy, LH gets caught up in her emotions (grief, wanting comfort, etc.) that her and Grissom kiss. Bang! The police break down the door to rescue Grissom (one of the other members of the shady group rats the bad guy out who the police have already caught; granddaughter is now safe) and alas Sara is also among the group because she was so worried and sees LH and Grissom so close together. She is of course upset and storms off, but then later is informed by Brass that Grissom was drugged. Sara comes down to the station and she and Gil have a heart to heart about how Heather has always just been a friend and she is the only one he loves.
Maybe the wedding could occur after this...
My other version is a little more simple, in that LH's granddaughter is still kidnapped and that Grissom still comes to see her, but LH, driven by fear and grief, tries to get too much "comfort" from Grissom, which he refuses to give, but he is afraid to leave her alone, so he stays and then she drugs him. Sara could then come by to see how the two are doing and see them kiss through a window, but then the same happy ending happens because Grissom was drugged into kissing LH.
Hmmm...have I put too much thought into this? :lol: