I had a similar thing about a year back, but it was my husbands ex from about 7 years ago...
I never liked her and i was on our shared email account and got this email from her, saying, "Hi Sweetie!!! Im truly sorry we stopped talking, if I had known the last time we talked would really be the last time...b.lah blah...I miss our friendship"
I emailed her right back and said, first of all, he's not your sweetie he's my sweetie and my husband, and secondly, he doesnt need a friend like you thank you very much, you shall not be hearing from him and please don't contact him again! Your correspondence is not welcome...
she never responded or emailed again...I told my husband about my emailing her and he just said, "WHO?" I said, *** YOU'RE EX...
"he's like, oh her...oh I havent thought about her in what, 7/8 years, ok, thats fine"