Complain to her line manager.
I had this problem when I was a house parent in a boarding school and effectively a teacher and therapist, available from 8am until 11pm (non residential) as well as teaching. I couldn’t take meals at the same time as the kids as I had to be available for supervising.
The amount of people, colleagues who would often let their “favourite kids” join, that would pile into my office at lunch or dinner was infuriating. Or they’d try and badger me to sit and eat with them at the normal eating times when I was on duty (so school lunch was at 1pm but mine was at 2pm, school dinner was at 6pm but mine was at 8).
I’d sit down in peace at 2pm having been available since 7.45am and not having got home until 11.30pm the night before. The door would fly open at 2:01,
Colleague breezes in “Hiya, will you help me do this risk assessment for the residential? I forgot to tell you, I’ve put you down to get it approved but it’s ok I’ve spoken to the office and they can get cover for your classes on the Friday afternoon. You are ok to drive the minibus aren’t you? Cos I don’t have my licence but I thought you could, it’s only Wales so not too bad and we should get there for 9ish. Have you ever administered Thalia’s epipen cos she really wants to go but she’s had a few random episodes and I’m not confident with needles but I thought you’ve got First Aid so you might be ok...”
Door flies open again
“HELLLOOOOOOOO MISS, I’ve JUST brought Demi-Rose here as she’s got a migraine but still needs to do her mock so I thought it’s always quiet in Misses office so I’ll just pop her in and she can take her test with you. Exam conditions, she needs to finish in one hour and fifteen minutes.
She won’t be a bit of bother will you Demi-Rose?”
I try to interject that I’m on a half hour lunch break and I’m teaching Period 5 so will not be in my office to ensure exam conditions or supervise...door flies open again.
“Miss, I know you are on a free right now but Matron’s bays are full. Emily has been feeling a little peaky just over exertion from PE and I thought she could lie on the sofa? Ooohhh hello Demi Rose what are you up to?”
“Miss Carter, while you’re hear Miss NameChange84 and I are just doing the risk assessment for the Wales residential. Could you get childcare that week as we could do with an extra person to be on the safe side for ratios?”
“Hiyyyyyyyyaaaaaaaa oooohhhhhh what’s going on in here, are we all having a skive?”
“OHMIGOD MISS SERIOUSLY I’VE JUST FUCKING WALKED OUT OF DOUBLE SCIENCE BECAUSE MRS CLOVERLY IS BEING A TOTAL BITCH AGAIN AND I CAN’T FUCKING FACE HER COS SHE KNOWS IM WORRIED SICK ABOUT MY LITTLE BROTHER AND SHE KEEPS DIG DIG DIGGING AT ME AND I CANT TAKE IT I JUST CANT FUCKING TAKE IT AND I THOUGHT I WAS GONNA HAVE A PANIC ATTACK AND THEN MEGAN LAUGHED AND I WANTED TO PUNCH HER BUT I REMEMBERED WHAT YOU SAID AND I TOOK A DEEP BREATH BUT I FEEL SO STRESSED AND PLEASE MISS PLEASE CAN I JUST SIT IN HERE UNTIL I CALM DOWN COS I AM SO STRESSED AND I DO GENUINELY THINK IM HAVING A PANIC ATTACK AND ITS JUST NOT FAIR”
Colleagues bugger off and leave me with a hysterical ugly-crying hyperventilating teen, a vomiting first year and some girl that I’ve never met but who seems to be trying to get out of a test.
Seriously, every lunchtime and dinner time. I’m not joking at all when I say I nearly had a nervous breakdown (I left due to Stress).
She’s being a twat. Line manager plus hand up in the stop signal “I’m on my lunch break. I don’t work through lunch. Come back later or leave it there.” and use broken record technique until she leaves.