Amiga. I am also extremely sorry to hear about the situation you find yourself in. Unfortunately, with your current aruments and apparent treatment, him marrying you is not the answer.
I know that your mother-in-law will be disappointed but she cannot blame you if her son is not responsible, does not treat you well and does not want to marry you.
Having your baby is a blessing and a responsibility. I pray for Him to soften your partners heart, grant you the comfort to cope with your predicament and you both the wisdom to do what is right for both you and your baby.
All the best!
