i’m not 100% sure how old brooke is, i would assume approaching/early 40s, so it wouldn’t be very difficult for her to conceive naturally. and if she did, there is a much higher chance of miscarriage or that child having a disability. to be awfully honest, if they had another child and found out it had a disability (downs syndrome for example) i imagine it going two ways: 1. they either terminate the pregnancy as being a full-time carer will affect brooke’s career, or 2. they will exploits the child and use its disability for views.
ultimately, it’s all clickbait. their videos have been getting jack all views recently, so obviously they need to hint at baby number 7 to get those numbers back up (AKA make more money). they just brought a whole house, so money will be tight, therefore it’s understandable that they are doing this.