Oh no, im not trying to scare you, but ive been there and it never ended pretty. My second pregnancy (first baby passed) my waters broke at 19 weeks too, they had me in hospital and antibiotics to stop infection. If ur cousin gets an infection the body will automatically go into labour, thats what happened to me at 20 weeks+4days (baby passed). Is ur cousin taking antibiotics??
Sorry im not trying to make you feel like theres no hope cause there is, every one is different and every pregnancy is different and i had an incompetent cervix which started the whole thing, they put a stitch in, but my waters kept leaking. I do hope all goes well. If she can hod on til 24 weeks bub should be ok. If you need to ask any questions im here