All we can glean from what she said is that it's very probably exactly what she thinks she needs to say to maximise her chance of getting out of jail.
Trump very clearly wants the story to go away, quite desperately so, and wields the magic pardoning sharpie of freedom, which he may wield for her if she exonerates him. It's not a matter of whether her testimony could prove anything in court of course, it's just about whether she smears him with a stench that won't wash off, which she might if she loses hope of gaining freedom. The more adamantly she whitewashes everyone right now, the less credible would be any future retraction, which is about the best result Trump can hope for.