<human>: Give me a shortened version of the text

I've had a lot of problems with my fiance's mom and step-mom. They hate me for unspecified reasons, and often cause drama unlike that of which I've seen since highschool. I really don't know what I've done to make them hate me so much.

My fiance and I have an extremely happy relationship; we communicate well, share similar beliefs and interests, yet are different enough to balance each other out. He proposed yesterday and I've never been so happy in my entire life!

However, I'm scared of the ensuing drama, because we haven't told his side of the family yet and I know what the reaction will be: his mother and step-mom will flip out, and try to break us up as they have in the past. I just don't get why they feel the need to do that. I have been nothing but humble and gracious towards them since I met them.

How do I deal with the drama when we tell his mom/step-mom we've gotten engaged? His mom is divorced from his biological father and his step-father. His step-mom has been married to his biological father for two years now. My fiance's father and step-father love me, while the women of his family do not. I can't even spend Christmas or Thanksgiving alone with my fiance without his mom/step-mom flipping out and demanding he spend those holidays with them. I am at a loss here. Thanks for the advice!
<bot>: My fiance's mother and step-mother of two years hate me for unknown reasons. I'm at a loss as to why. How do we deal with the drama that will inevitably come up when we tell them we've gotten engaged?