Thanks so much for all of your views, so many different opinions!
Wannabe, how are you?! Long time no speak!
Just to clear up, number six, I wasn't for one minute saying she hits her child because she is a single parent, I really hope you don't think I meant it like that. I suppose what I was saying was that compared to my lifestyle (i.e. I am married so have the support of a loving husband/full time dad, we don't really have money worries hanging over our heads, or any other stresses) I guess I was just saying that I don't get as wound up as she does, so therefore, I have the time and patience to hand out disapline that isn't 'as quick and easy' as a smack. I hope I got that to come across the right way.
I think in conclusion, all I can do really is just wait and see how the friendship pans out, she might stop going to mums and tots next week and I'll not see her again, or we may still be friends in 20 years time, in which case, as was pointed out, the smacking stage would have been long left behind anyway.
I hope I can overcome it, tbh, could do with a friend up here in the cold north west!