With all the chaos, it isn't explained where Tess is sleeping. Stevie had moved into the master bedroom and the cottage is empty since Meg had been at Terry's place.
Parentage can be told by comparing Jodi's DNA to that of Tess. No need to have Jack's at all.
Hospitals do not take xrays for appendix operations.
It's not believable that with 100,000 things to do on a busy farm that 6 people can all sit idle waiting for the phone to ring.