I am with V on giving W some generalities on the theme. The key here is NOT to make it all about the M or W. You would want to be judicious with how much you share with W given that you two have had no contact for 4 months. Do this in dribbles as you two will need to re-build a friendship.
You don't scare away a new friend by getting too intense or deep, right? Same with W. She is a new friend that you've just met two weekends ago and starting from square 1. With that mind set, I think you'll do fine.
