Ok thanks for that explanation. So the kids on the cruise were Anna (18) and her 9 year old brother, the 16 yo stepbrother (suspect) and the 2 younger halfbrother and halfsister sleeping with the parents. Is that correct?
No, both 9 year olds are girls. One of Anna's relation and one of the suspect's relation, siblings to each. The 14 year old brother was Anna's brother out on the ship taking pictures, who also shared the room. The two 9 year old girls shared a room with the "parents", one of each (meaning each parent was a blood relative to each). I'm trying to keep it concise with wording so as not to confuse.
Anna 18, the perp 16, and Anna's "real" brother 14 shared the room. Her and the 16 year old were steps, no parent shared. Two 9 year olds shared a stateroom or suite with the parents, one was Anna's "real" sister and one was her stepsister ("real" sister to the stepbrother) and "real" sister of Anna.
it gets confusing when getting into exes and there is an 18 year old too of the perp's that is a "real" brother.
To keep it simpler:
Anna's dad was on the cruise with his new wife. Dad had his kids with who were Anna 18, and son 14 (sharing the cabin with perp and Anna) and a daughter 9, sharing cabin with he and his new(er) wife. The wife had her son 16 (the perp, in Anna's room with 14 year old, Anna's real brother) and a 9 year old daughter of hers with (sharing a room or suite with the "parents" or stepparents of all/each).
So 18 year old Anna, 14 year old "real" brother sharing the room she was in and 9 year old girl with "parents" are her "real siblings".
16 year old perp and another 9 year old girl were the kids of the stepmom (to Anna). So one set of siblings of the "dad" were his, and one set of the mom were hers. Each set of kids are steps to the other set of kids. Each "parent" is a bio of their own set and a stepparent to the other set.
I tried to simplify it but probably made it harder lol.
Anna 18, her brother 14, and her sister 9, and their dad were on the cruise and are "real" siblings.
Perp 16, his sister 9, and their mom were on the cruise and are "real" siblings. Dad of first set and mom of second set I named just now are married. Makes the kids of both sets stepsiblings.
These last few sentences are the clearest/simplest explanation lol.