Hi Lea
I am sorry as I have not read all your story
I am just going to throw something out there for you to consider

lets say this woman really loves your sons...
what is the problem in letting her show it

she will never be their mother

I am the psuedo step-mother to C's daughter
his ex-wife HATES me (I had nothing to do with their marriage or break up as she cheated on him and did drugs and left him and their daughter)
anyway
she hates me
she blasts me on facebook
accuses me of everything under the sun (the latest but not worst is that I only make food from a box...yes she said it in court)
she won't let me talk to her teachers
(long story as to why she has A right now...sufficed to say it won't be long)
or speak to her on the phone (she hangs up the phone is she hears her talking to me)

all I have done is love A

Your place is secure, your boys know who their mom is


I have learned that it is our own insecurities and hang-ups that get us in the end
and
if she is giving half as much time to thinking about you as you are to thinking about her, their relationship won't last very long

our time is short
focus on what is important

leave the rest behind