Hello Petra3,

                   trying to understand mood swings in terminally ill patients ?, you might just as well try to understand why they were chosen to get it in the first place.

                                                                                           l think accepting it happens but not accepting you have to face it is a much better start point.Others posting on this site far better placed than me,suggested to leave the room,/conversation,pointing out you will be available to help/listen when they are ready to rejoin reasonable interaction, and l think this was wise advice.l can see how the each party feeds off the raised tensions exacerbating an already difficult situation.Your feeling of guilt is just a manifestation of your care and concern.

                                                                                Facing a long certain walk to your final destination can be a hard road of acceptance for the sufferer,but that road can be one of contented  final fufillment,or bleak desolate slog,and for those looking on, it can be torturous watching those they love struggle with the realisation they have a choice.Someone has to remain on the level and see it with clarity for what it is, and that person has to be you in this relationship,until the sufferer eventually comes to terms within themselves of accepting their reality and hopefully taking control of runaway emotions.

                                                                                                                                    In so many ways you face the harder task,but you both are victims of this insidious affliction,and remember to care for yourself as well as your daughter,you can do neither if you make yourself ill or become driven apart.

           l can only hope there will come a mutually agreeable plateau from which you can both find a way to create a beautiful final chapter,that can bring contentment to both,

                                                                                                      my very best wishes,

                                                                                                                                        David