Talk about a slow burn! “Jax” (Nadine Marshall) lives happily enough with “Mark” (Idris Elba) and their young son “JJ” (Kai Francis Lewis) in their well-appointed London home. When she starts to feel a bit poorly, she heads to the doctor where she is given some news that doesn’t stack up. Just how is she going to reconcile this news with “Mark”, her son and just as importantly herself? “JJ” is quite excited about the imminent prospect but his dad knows full well that something is amiss - and so becomes understandably suspicious that she’s been playing away from home. She knows that she…