well, this may not be much help, as i didn't watch it on sunday - but i watched most of it last night...
her father got a new gf- who then turned into a wife, on their wedding day one of the rings went missing but they just thought they had lost it...
the little boy michel?!?!(not sure if thats rite) stayed with them for the summer as his parents were on another honeymoon and he then found the ring in her draw in the dressing table- this caused a palava and it was made worse by the fact that the fathers new wife was writing a book about an old reverend person who had practised sacrifice!! rosie then got obssed with his poetry and next thing they know they find a dead cat- with not head hanging on the village notice board!!!
rosie didn't get the grades she needed to get into cambridge (only 2 A's and 2 B's) she blamed this on them having rather loud sex in the room next door- this resulted in there realtionshp going to pot (blimey this is all really confusing!!)
in the mean time the big house down the road had been left in a will to 2 young adults (brother and sister) rosie started going out with the guy, and then during the village fete (held at that house) the new wife got a bit to friendly with the guy and it looked like the revernd got a bit to friendly with the girl...
after that i feel asleep so i have no idea what happened- any wya hope this helps and if you watch it to night then they will probably give you a catch up bit- and shes going mental anyway!!!