Try these !
I copied these photos directly from your website, the first two are OK but the next two still too small.
All you have to do is to post more photos like Jenny and Rita on to your website first, then in the Forum, instead of posting them as attachments, post them as LINK.
Firstly you right click on the photo you want to post and select: Copy image URL
Then You click the Insert Image icon from above, and select from URL, paste the URL address into the window
then uncheck the box where it said: Retrieve remote file and reference locally, then click OK and you photo will be there.
Cheers