I know of a girl whose work called her as they 'needed her'4 wks after her 1st baby was born & she ended up going back 3 days per week til he was 7 months old. Then she went back Full time when she fell preg with #2 it was harder with a 2yr old at home & so asked to come in at 10am instead of 8 & to finish at 5 (as she usually was in the office til 7sih!) She suffers severe M/S & has all sorts of issues when preg...

They initiaqlly agreed then when she was 6-7mths preg she asked to go part time, tehy agreed but noone signed anything & she worked part time but whatever hours she could do as such (thinking shew as helping them & them her!)

Then about 3 wks after that the boss came in & told her as she is casual they dont need her anymore & she's not entitled to mat leave!!! She was on almost 80K a year & her hubby whom has a cracked verterbrae that cant be mended (it's about 8yrs old the injury) & he can only do light duties, it was her income they relied on...
So she abused them all walked out & never went back! Head Office in italy called her the following day to offer her a permanent Full time role again & her maternity leave, but shew as so angry she told him to shove it!!! Sure she regrets it now...

But Morale of the story... Once your CASUAL you have NO entitlements to anything!!!!

DO NOT agree & if you feel pressured get your dr to write a certificate for stress & get some legal advice!!!