Almost assuredly this is not the case. One, the state is going after both of them for the same incident, and the evidence they have is strong enough where some kind of deal in return for testimony isn't needed. In addition, the same evidence is going to be used against both of them. I don't think there's any reason for the state to offer that deal. Secondly, there's no evidence she's distanced herself from her husband at all. Lastly, even offering that deal would raise a constitutional question. Even if it went nowhere, it isn't a good look to offer a deal for testimony against a spouse. Spousal privilege is a really big deal and, in my opinion, the state won't want to touch that with a ten foot pole, meaning that Kayla would have to retain independent counsel and approach the DA asking for such a deal, which I think is extraordinarily unlikely.