u better ask your boyfriend to handle it carefully. Now is his turn to stabilise you and his family relationship.
integrity and respect both are important for you and upcoming new families members.
of course now the most important thing is ensure you both families are acknowledge the fact and relationship for you and your 'husband'.
however, your boyfriend should also take this as opportunity to learn how to be a responsible man.
do remember, money is not important. take care yourself and your families.
be happy