Yeah, I kind of thought Kahvi might have been lying to Rayek about not knowing whether the child was his. She obviously had no trouble lying to him. "That answers that!" might have been a reference to Venka's obviously looking like Rayek. There was no way she could be anyone else's-- whereas if she'd looked like Kahvi, Kahvi could have told Rayek the child just wasn't his, rather than that the child was dead.