I would say odds of non fucked up twins 99.9% likely, odds of twins in general probably low but given the fact shitty people like this seem to be really freaking fertile, it will happen. Slight PL but I knew a girl who had two kids initially taken by the state due to abuse. She got pregnant after, had a tubal pregnancy and lost her Fallopian tube (hooray!). A couple years later she got pregnant with twins, lost those to the stage because that dad was nodding out on heroin in the hospital room. (Although I honestly think they were destined to be taken from her even without junkie dad). She then got pregnant again by a different guy the following year and lost that baby to the state as well.
I’m not for sure about the mom being at risk of the baby doesn’t have organs but it make sense, Normal pregnancy itself is hard enough on your body and your kidneys work really, really hard in normal pregnancies.