On the phone (I live overseas) she always does the following.
For example (this is a recent one)
Her: Have you watched game of thrones yet?
Me: no I haven't seen it yet - I've got to buy a Foxtel prescription
Her: oh, I watched it last night.
Me: cool, no spoilers please because I know she always does this
Her: oh it was so good, xy did this and...
Me: please don't mum I haven't seen it yet, I don't want to hear it.
Her: oh I was gonna say what x did to y was horrible...
Ad infinitum. Until I put the phone down. My fuse has gotten shorter recently.
It's not always spoilers sometimes it's a blow by blow encounter from a tv show I've never watched or disliked, which annoys me as I have to hear about such and such characters doing x y and z and something about a gay cage fighter... god knows.
I was very upset the other day as I had some important news to tell her but only 15mins or so spare as I had to take DD to her dads by a certain time. I tried to tell her that but all I got in return was "oh I was gonna say " so I just sort of shut up and waited. Had her on the phone while I sorted everything got dd strapped in and I had to go but then all I got was "why? Is everything alright" my response "yes I must take DD to Ex name house I'll be back at such and such time" then she makes me feel guilty by going "oh... I didn't realise you didn't have time..."
Another thing I've sort of touched on is when she says "I was going to say"
She'll be interrupted by me getting flustered and frustrated, then all she says is "I was going to say "
I love her but god she is so hard to talk to 