"Today," I said firmly.

Ended up standing having fat measured with pinchers by Rebel.

"Now I'm just making these marks so I can see what I'm measuring," he said bossily, putting circles and crosses all over me with a felt tip. "They'll come off if you rub them with a bit of white spirit."

Next had to go into gym and do exercises with all sorts of unexplained eye contact and touching with Rebel - e.g. standing opposite with hands on each other's shoulders with Rebel doing squats, bouncing bottom robustly on mat and me making awkward attempts to bend knees slightly, At end of whole thing felt as though had had long and intimate sex session with Rebel and we were practically going out. Afterwards got dressed and had shower then was unsure what to do - seemed ought at least to go back in and ask what time he'd be home for dinner. But of course am having dinner with Mark Darcy.

V. excited about dinner. Have been practising in outfit and really it looks excellent, sleek smooth lines, all thanks to scary pants, which there is no reason he should find out about. Also really no reason why should not be v.g. escort. Am woman of world with career etc.

Midnight. When finally arrived at Guildhall, Mark was pacing up and down outside in black tie and big overcoat. Fwaw. Love when you are going out with someone and they suddenly seem like an extremely attractive stranger and all you want to do is rush home and shag them senseless as if you have only just met. (Not, of course, that that is what normally do with people have only just met.) When he saw me he looked really shocked, laughed, then composed his features and gestured me towards the doors in polite, public-school fashion.

"Sorry I'm late," I said breathlessly.

"You're not," he said, "I lied about the kick-off." He looked at me again in a strange way.

What?" I said.

"Nothing, nothing," he said over-calmly and pleasantly, as if I were a lunatic standing on a car holding an axe in one hand and his wife's head in the other. He ushered me through the door, as a uniformed footman held it open for us.

Inside was high, dark-panelled entrance hall with many black-tied old people murmuring around. Saw woman in sequinned crusty top thing looking at me in odd way, Mark nodded pleasantly at her and whispered in my ear, "Why don't you just slip into the cloakroom and look at your face."

I shot off into loo. Unfortunately, in the dark of taxi, I had applied dark grey Mac eyeshadow to my cheeks instead of blusher: the sort of thing that could happen to anyone, obviously, as packaging identical. When came out of toilets, neatly scrubbed with coat handed in, stopped dead in tracks. Mark was talking to Rebecca.

She was wearing a coffee-coloured plunging, backless satin number that clung to her every fleshless bone with clearly no corset. Felt like my dad did when he put a cake into the Grafton Underwood fete and when he returned to it after the judging it had a note on saying, 'Not up to Competition Standard'.

"I mean it was just too funny," Rebecca was saying and laughing full in Mark's face affectionately. "Oh Bridget," Rebecca said, as I joined them. "How are you, lovely girl!" She kissed me at which could not stop self pulling face. "Feeling nervous?"

"Nervous?" said Mark. "Why would she be nervous? She's the embodiment of inner poise, aren't you, Bridge." For just a split second saw a look of annoyance cross

Rebecca's face before she composed it again and said, "Ahhh, isn't that sweet? I'm so happy for you!" Then she glided off with a coy little backwards look at Mark.

"She seems very nice," said Mark. "Always seems extremely nice and intelligent."

Always?? I was thinking. Always? I thought he'd only met her twice. He slid his arm dangerously close to my corset so had to jump away. A couple of huffer-puffers came up to us and started congratulating Mark about something he'd done with a Mexican. He chatted pleasantly for a minute or two then skilfully extracted us, and led us through to the dining room.

Was v. glamorous: dark wood, round tables, candlelight and shimmering crystal. Trouble was, kept having to jump away from Mark every time he put his hand on my waist.

Our table was already filling up with an array of brittly confident thirty-something lawyers, bellowing with laughter and trying to outdo each other with the sort of flippant conversational sallies that are obviously tips of huge icebergs of legal and Zeitgeisty knowledge:

"How do you know if you're addicted to the Internet?" "You realize you don't know the gender of your three best friends." Haaar Waagh. Harharhar.

"You

can't write full stops any more without adding co.uk."BAAAAAAAAAAA!

"You do all your work assignments in HMTL Protocol." Blaaaaagh harhar. Braaaah. Hahah.

As the room started to settle into the meal, a woman called Louise Barton-Foster (incredibly opinionated lawyer and the sort of woman you can imagine forcing you to eat liver) started holding forth for what seemed like 3 months with complete bollocks.

"But in a sense," she was saying, staring ferociously at the menu, "one could argue the entire ER Emeuro Proto is a Gerbilisshew."

Was perfectly OK - just sat quietly and ate and drank things - until Mark suddenly said, "I think you're absolutely right, Louise. If I'm going to vote Tory again I want to know my views are being (a) researched and (b) represented."

I stared at him in horror. Felt like my friend Simon did once when he was playing with some children at a party when their grandfather turned up and he was Robert Maxwell - and suddenly Simon looked at toddlers and saw they were all mini-Robert Maxwells with beetling brows and huge chins.

Realize when start a relationship with a new person there will be differences between you, differences that have to be adapted to and smoothed down like rough corners, but had never, ever in a million years suspected I might have been sleeping with a man who voted Tory. Suddenly felt I didn't know Mark Darcy at all, and for all I knew, all the weeks we had been going out he had been secretly collecting limited edition miniature pottery animals wearing bonnets from the back pages of Sunday supplements, or slipping off to rugby matches on a coach and mooning at other motorists out of the back window.

Conversation was getting snootier and snootier and more and more showy-offy.