i've had it happen...though not quite after such a long period of time. sometimes it's just a friendly attempt to keep in contact. sometimes it's an attempt to check up on you to see if your life is as miserable as hers so she doesn't feel so bad about her situation. other possibilities could be she may be trying to rekindle old feelings. there really are many different possible reasons. i'd say your safest bet is to see it as a friend dropping a line to see how you're doing. but you have to be careful what you say...because wifey could find out and not like your choice of words or the idea of you talking to her