Possible but his dad’s known victim was a 10 year old girl. By that age, the sex differences between boys and girls are fairly pronounced (as opposed to toddlers and young children) which speaks to a heterosexual orientation.
Challenor was also removed from his mother’s custody and placed in care due to neglect, though I’m not sure for how long and at what age; that would’ve removed him from his father’s presence as well.
What is likely is that David exposed his children to sexual situations and materials— which in itself if child sexual abuse, just without the physical contact. Growing up in a home where pornography is shared, sex is discussed openly and inappropriately, and attitudes towards sex are permissive and without boundaries? Perfect storm for creating a pedo or pedo enabler like Aimee.
Someone can correct me in this, but I don’t think Aimee has ever claimed to be a victim of CSA at the hands of his father, something which he could’ve easily done during the Green Party investigation in order to paint himself as more sympathetic.