Why does everyone keep saying redhead still life is clarks wife

Its been bothering me so badly because there is really no evidence (that makes sense anyway) that points to her being his wife. shes not even played by the same actress as the woman who plays clarks wife, if it were his wife wouldnt they just use the same girl? I understand the table scene seeming like it was pointing to that but heres the thing, clarks wife isnt the only redhead to exist hes probably just using her because shes the most similar. The whole “running away when she sees captain clark because clark used to abuse her” doesnt make sense either because the still life in the wheelchair also starts tweaking out when he sees captain clark. I think captain clark is just a lot more powerful and complex than the others (him being bigger, bleeding when mary hit him instead of just being fluff, etc) but i could totally be wrong about this!