Email Subject Line "response" question

Birdyne

Sorry - this isn't truly a gadget question, but obviously I don't have enough techy in my to answer this question myself.

If you send a message in response to another piece of email, your email software will preface the subject line with Re: or RE:

When the correspondence continues to bop back and forth between yourself and the original sender, the subject line does not add additional Re: or RE:

I'm having some difficult back and forth topics via emails with another party, and when she continues to "reply" back, the Subject line "grows" with more and more "Re:".... so instead of it saying:

Subject: Re: Medical statements

it says

Subject: RE: Re: Medical statements 

Because the material is sensitive and I consider private between the two of us, I'm wondering if the double "RE" prefix in the subject lines indicate that they are being sent to a third party/email by them before they respond.

This growing subject line prefix only happens with this one individual, and only since the topic of conversation has become more muddled.  Other emails from the same email software but different users does not behave this way.  I've googled for help, but am coming up with nothing.  I do not want to make the situation more tense by asking about it unless I know how it occurs.   

Any insight as to if this should tip me off that emails are being forwarded? and then re-replied to?  I've tried a couple of scenarios from my own email and for the life of me, I can not duplicate the subject line's behavior.

TIA 

GilliC

It really depends on the software you use to send email. Some email programs will always prepend the RE: when you reply, and some recognize that the message is already a reply and don't add another one. In many programs you can even customize what (if anything) it tacks on when you reply. So it really doesn't at all indicate whether the emails have been sent to anyone else.