Could Rebecca be Lees' ex-wife?
Image if Rebecca was Lees' ex-wife and she found the photo of Lee in Clems' things.
Would the two bond over a common acquaintance (provided Rebecca forgives Lee as he looked after Clem) or would it cause them further friction?
Clem running into someone from Lees' past who doesn't remember him too fondly would be an interesting concept to explore, it would allow for a good conflict of saint vs. sinner and whether someone can really atone for murder by saving a life.
Plus Rebecca's conduct with the baby (unknown father) could actually reinforce Lees' justification for murder which would make him somewhat more forgivable.
Anyway I'm probably way off the mark, but it's nice to theorize while waiting for the rest of the season.