Yup pretty much, on the video she posted on stories it sounded like another bloke was there laughing possibly Brooke's bf if that's the case then it would only be 2 other people that could goFrom Gov website:
'meeting outdoors in a group of up to 6 people with those you do not live with, but you should do this while observing social distancing guidelines and keeping at least 2 metres apart'
I read this as a maximum of 6 people so she can only invite 3 people from one other household?