With your intel about W's activities with the OM, it is all the more reason to go PITCH BLACK with W and get your ducks lined up in a row regarding the legalities of a S.
As for taking W's stuff out and delivering it to her new place, the answer is no. Not your place to do so.
Through your stated boundary, contacting L, and going dark on W are all actions of a strong and courageous man.
I am sure Starsky will come around and share his experiences on how he made sure Mrs. Starstky paid back money that funded her affair. Very informative and enlightening that all LBS men should take note here when their wives are active in an affair with the OM.