Do i have the right to be upset?! Please READ

So, my SO is coming to my parents house today for 5 days. I haven't seen him for months and he's leaving to go back to his duty station on sunday. Well my mom thought I was going to sleep with my SO (since am already pregnant how much pregnant can I get🤷) you know to just spend those precious moments together. Well, my dad doesn't like the idea and thinks I should sleep with my brother who's sick with a horrible cough.. y'all I know what you guys might say but, I haven't spent our special moments together. My parents especially my dad let my sister sleep her fiance together close doors. My hormones are getting the best of me right now