"But I still can't see how he forgot to mention giving her a lift, it's a big and important part of the day"
No, it really isn't.
Maybe it seems so to you because you are at home all day, but I think your perspective on its importance is a little skewed.
MorrisZapp
"Who knew that the word 'girl' had such strong connotations?"
Sorry, that was mostly me and I did not intend to the meaning you inferred at all. I just assume that this is a grown woman and was being a bit snotty about her being referred to as a "girl".
I have been thinking about this a lot recently as my DD (21 mos) likes to talk about who is a man, who is a woman, who is a boy, and who is a girl
The woman in this situation would be entirely blameless, even if the DH had been lying about the lifts, which it appears he wasn't.
wubblybubbly
"However, if I thought for one minute he wasn't being upfront about it with his wife or that she felt she was missing out on his help/company at home because of me, I'd be gutted and a bit concerned actually. "
Totally agree.
kat
"Yeah, if my DH 'stopped me' giving a colleague a lift or anything else innocuous I'd probably say 'sorry, I have to stop X, DH is being difficult about it. I'll deal with that myself but for now I'd rather not get the hassle'."
I would never, ever say to a colleague that my DH was being difficult, or causing me hassle.
If I agreed to stop giving someone a lift because he was uncomfortable with it (which is almost impossible to imagine, because he would never ask and I would never agree ), it would be a big deal and I certainly wouldn't be talking about him in those terms to people he didn't know.