I don't see any reason why this mother could not be seen by a midwife. If the family is opting to provide comfort cares only, delivering with a midwife or even having a home birth may be a really great option for them. Having their baby at home would ensure that they will be able to spend as much quality time as possible with their baby during the short time he or she is alive.
There are also many doulas who specialize in supporting mothers who are expecting to lose an infant. This may be a good option as well.