I saw a client back in April, and everything was fine, a perfect gentleman, etc. The next day he sent an email asking for an overnight "date". He was less than thrilled with my £800 asking price.    He sent a few other friendly emails, then stopped emailing when he asked me to wear a certain outfit that I don't have and don't particularly want to buy (I told him if he provided it, I'd wear it). So, I figured that was the end of it.

Well, last night I noticed I had an email from him asking to see me again. Sure, no problem. It was late so I decided not to reply until today. So, I've gone to reply and I have two others from him, one moaning about my lack of reply (it's been less than 24 hours! sheesh!)  and one other, which has kind of given me the heebie jeebies.  Should I be concerned about this, or is it just a bit of harmless fantasy?

Here are some abstracts:

"... then blind fold you, lead you to the bedroom, you are in front of my mirror...,"
"....when my friend creeps in the room, kneels in front of you and starts..."   (first mention of a "friend")

Nothing overtly menacing, just that. The rest of the email is just sex stuff. His previous emails have all been friendly chat or confirmation, this is new.

Not sure if I should reply with "sounds great, it'll be double my rate for your friend to join in"  or "umm, don't think so, sorry."  ?

Absolutely agree. Definately a no-no... He's obviously pissed off with you for not sitting at your computer all day waiting for his emails so you can reply within 10 seconds... I'd ignore him if i were you? Not worth the risk...

Not sure if I should reply with "sounds great, it'll be double my rate for your friend to join in"  or "umm, don't think so, sorry."  ?

It's not wise to arrange an MMF booking with someone who's already made you doubt his sanity by doing even something relatively minor as spam you with demanding emails. Sure, many MMF requests are pure fantasy so it's not like we're in any danger from those ones, but if it goes ahead and you're locked in a room (blindfolded!?) with two random men? Yeah, that'll likely be a few very loooong minutes that anyone would spend regretting choosing to overlook previous "relatively minor" weirdness.

For perspective: I don't do MMF bookings at all. I did one once (well, two, but for the same client) back in my naive agency days and while it was uncomfortable and quite boring (being poked, prodded and pounded non-stop; the client in particular happened to be the sort of guy who looks over your naked body like a scientist conducting an experiment!), I obviously survived but I would never do one again unless I was providing my own male partner. They're just not as fun as they might sound, mostly because it's impossible to relax unless you have on-site security.

Strangely enough I had a long email from someone a little while ago with the very same fantasy except he didn't mention the friend just the being blindfolded and us both being in front of a mirror etc.  I just pressed delete and didn't reply.  I hate when you get a full page email of just their fantasies.  

One guy I refused to see ages ago proceeded to send me a video of him and another girl (she obviously knew they were being filmed but don't know if she was a prossie).  I hadn't long started at the time and before sending me the video he actually had ME phoning a hotel for availability and I was going to chip in half the hotel fee with him!!  I came to my senses within 10 minutes and then later on that night I got the email with the video.  As if thats going to make me change my mind!!! 
He text and emailed for me for a while after that but I just ignored him.  And I won't open attachments anymore as they could be viruses.

Anyway I digress!  I wouldn't see him again he sounds like a complete weirdo.  I wouldn't even be apologetic about it cos he sounds like the manipulative type and someone who could cause you stress and be a complete pain in the arse.  Its so important in this job to show the clients that you're the one who's in control even if its just in emails.  

Thanks again ladies. I replied to him and told him i was uncomfortable with both the fantasy (that was worded  along the lines of "When you arrive we will do this", not "I have a fantasy about") and his impatience. He replied with a apology and said it was absolutely just a fantasy, etc.  So, I decided I'd see him again, having seen him once before, and deciding to ensure my driver was close by the whole time. I reminded him that my fee had increased by ?50 since the last time, and I haven't heard from him since.    A cheapskate and a weirdo.