Seven Days of Us by Francesca Hornak

Spending a week with your family can be difficult but spending a week with the Birch family can be really tough. Olivia has just returned from Africa where she has been treating a highly contagious epidemic and the whole family must be quarantined for a week at their English manor home. Each has a secret and only their mom is really looking forward to spending time all together. As they just try to get through one more day, secrets begin to come out and tensions flare. This is not the holidays at Downton Abbey. There is a bigger threat of them killing each other than catching the Haag virus.
The Birch family is just trying to have a normal holiday week together and like most families - they are anything but.