The daughter of a woman who went missing in the Bahamas after falling overboard on a boat ride with her husband has claimed her stepfather 'probably preplanned' the tragic event.

Lynette Hooker, 55, of Onsted, Michigan, plunged into the Abaco Islands' water on April 4 while traveling with partner Brian Hooker, 59, to their boat in Elbow Cay.

Lynette's daughter, Karli Aylesworth, visited the boat where her mother and stepfather were living on April 17.

'When I first got here, I sat up there and looked at the boat and started talking to her like she was here,' said Aylesworth to Today.

'I was like, "Hey Mom, I'm here. Wherever you are. I just want to talk to you and see you again."'

Her stepfather told police that he and her mother left Hope Town around 7.30pm in an 8ft dinghy.

He also told investigators that Lynette slipped and fell in poor weather while holding the key to the small boat, which caused the engine to shut off.

Brian was detained by the Royal Bahamas Police Force on April 8 and was released five days later. His attorney, Terrel Butler, said officials had no evidence against his client, according to Today.

However, Aylesworth is skeptical of Brian's account of what happened to her mother.

'I hope this was just a freak accident, but I just have a hard time believing it at the moment,' Aylesworth told NBC News on April 9. 'I just want to know the truth.'

'I feel like this was probably preplanned, if anything, like, it doesn't seem like just some accident,' she added.

The stepfather remains a suspect in the case, Royal Bahamas Police Commissioner Shanta Knowles told NBC News.

His lawyers told the outlet in a statement that Brian 'categorically and unequivocally denies any wrongdoing and in particular the allegations recently made by Karli Aylesworth.'

He has left the Bahamas to take care of his sick mother but plans to return.

Aylesworth also previously opened up about her mother and stepfather's relationship.

'There is a history of him choking her out and threatening to throw her overboard,' she told Fox News.

'So, the fact that this is actually happening makes me believe there's more to the story.' 

'There has also been a history of domestic violence in that relationship, so I do believe something might have happened to her.'

Aylesworth explained why she felt the circumstances surrounding her mother's disappearance were suspicious and called for a full investigation into what happened.

'It just doesn't add up. My mom is very fit and strong. She's a good swimmer, like, why was she swimming away from the boat?' she said.

'I'm confused why she has the keys because she never drove the dinghy. It was always Brian. So, the story just doesn't add up right now.'

Aylesworth shared a voicemail Brian sent her with CBS News, in which he spoke about throwing a flotation device to Lynette after she fell.

'Hello, honey, it's Dad. I just got a call from Hope Town Search and Rescue, and they found the flotation device that I threw to Mom when she fell overboard,' he told his stepdaughter.

Brian broke his silence in an April 8 Facebook post, writing that he is 'heartbroken' over Lynette's disappearance.

'I am heartbroken over the recent boat accident in unpredictable seas and high winds that caused my beloved Lynette to fall from our small dinghy near Elbow Cay in the Bahamas,' he wrote.

'Despite desperate attempts to reach her, the winds and currents drove us further apart. We continue to search for her and that is my sole focus.'

On April 16, Aylesworth said she had not heard from Brian since his release from custody.