Jealousy

Anyone else dealing with a jealous family member or friend? I hate that my own sister (who is 14 years older than me.. I'm 24) is so jealous of me. There's nothing to be jealous about, we made different life choices and are at completely different stages of life. She is married and pregnant with her third, I'm with my middleschool/highschool sweetheart and pregnant with our first. He hasn't had an easy life but has made a complete turn around over the past few years and I couldn't be more proud of him.. He moved in with my family when my dad was going through cancer treatment and really stepped in and did all of the things my mom and I weren't able to do. My sister is jealous that we are living with them, and it's nothing to be jealous of.. She downgrades my boyfriend for not being born into a wealthy family that can afford for him to go to college and buy me a house like all of her men have. And now that we are so excited for our 3D ultrasound she tells me that we can only afford it because of where we live, and that she always wanted one but they are too expensive. (We are paying $80 for a package deal, and to me that is affordable for basically anyone who works). It's really hard to even talk to her bc she is always making backhanded comments towards everything we are looking forward to. Sorry just had to rant for a moment, as she just posted on my Facebook about her ultrasound coming up but had to throw it in there that it won't be 3D, and did the same thing when texting my mom about it. I love my sister and all of nieces and my unborn nephew, but she's constantly making our relationship hard, and hard to have a real connection with her.