I was thinking perhaps Faith and Wesley? I think that our timid Watcher has grown into someone who can tame the wildness in Faith. How's this:
From "5 By 5"
Faith: "All these little cuts and bruises - just bring out the mother in me. (She takes his face between her hands and slaps his cheek) Come on. Now, now, don't poop out on me, damn it! Otherwise this all just going to be over too fast, and you'll be dead and I'll be - bored. - Come on, Wesley! Where is that stiff upper lip? Now, we've only done one of the five basic torture groups. We've done blunt - but that still leaves sharp, cold, hot and loud. Have a preference?
(Wesley nods. Faith takes off his gag.)
Faith: Well, that great! It's always better with audience participation. - May I take your order please?"
Wesley: "I was your Watcher, Faith. - I know the real you - and eve if you kill me, there is just one thing I want you to remember."
Faith: "What's that, love?"
Wesley: "You - are a piece of sh.."
(Faith stuff the gag back into Wesley's mouth.)
Faith: "You should talk, huh? I guess I'll just have to try a little harder."
(She walks over to a picture frame, smashes it on the table and picks up one of the glass shards.)
Faith: "We'll switch to sharp for a while."
AND:
(Faith gets off the windowsill and comes over rubbing her hands together.)
Faith: "That's refreshing. But I'm feeling a little cold. (Pats Wesley on the cheek) What do you say we warm the place up?"
(We see blood on Wesley's shirt as Faith goes into the kitchen and picks up a lighter.)
Faith: "Did you ever wonder if things would have been different - if we'd never met. What if you'd had Buffy - and Giles would have been my Watcher? You think you'd still be here right now? Or would Giles be sitting in that chair? - Or is it just like fate. You know, there is no choice. You were gonna be here no matter what. - (Picks up a spray can) You think about that stuff? - Fate - and destiny. (Walks over to Wesley) I don't.
(She depresses the top of the spray can and holds the lighter flame into the spray igniting it where Wesley can get a good look at the resulting flame shooting forth)
Faith: Not that any of this is your own fault. (Flames again) Since this may be - the last chance we will have to unload on each other, I feel that it is kind of my duty to tell you that if you'd been a better Watcher, I might have been a more positive role model! (Flames again) - Face it, Wesley, you really were a jerk. Always walking around as if you had some great big stake rammed up your - English Channel. (Frowns and takes the gag out) - I think I want to hear you scream."
Wesley: "You never will."
Faith: "Admit it, Wesley, didn't you always kind of have the hots for me?"
(Faith flames again as the door burst form its hinges and Angel slowly walks in. Faith drops the can and lighter, pulls a knife and holds it against Wesley's throat.)
Is this love or what???