Prompt: Because reasons Norrell casts an enchantment that makes Strange think he is Arabella. Possibly to try and get information on Strange and how much he knows about the Lady Pole situation. Things backfire when Strange kisses his "wife" and Norrell starts freaking out but has to play the part and tentatively kisses Strange back.

Fill: http://jsmn-kinkmeme.dreamwidth.org/1273.html?thread=808697#cmt808697