My sister found out she was pregnant (totally unplanned) shortly after me and is approx a month behind me. She and her boyfriend were going to move out of their respective homes and rent their own place but my parents have asked her to stay and for him to move in so they can save up to buy.
I'm not going to lie, I've really struggled with the fact my parents will be with her baby 24/7 - I think that's normal. It took me a while to come to terms with my feelings on the issue - and I did talk to my parents about it but they just reassure me it won't affect things but it obviously will. My sister for her part was really upset in the beginning and almost too worried that she was stealing my thunder!
All I can focus on is my little growing family. My husband and I have worked hard for our life and we are truly blessed and my sister had had her life turned completely inside out by this so I know she needs support. We've planned for this baby for a while, and are fortunate enough to have saved money to be able to buy a family home and buy lovely things for our baby, whereas I know she worries about how she is going to make it all work.
It's complicated but it's happening and every baby is a blessing 😊
My only other issue is my mum is now so concerned with buying the same for each of us and treating each baby equally that I think she forgets they are going to be different babies! It also bugs me when people talk about her being early and me being late and so her baby will be the first grandchild! But then I have to almost physically shake it off and focus on my own pregnancy and journey.
Basically I'm saying I think the way you are feeling is completely normal. It's important to acknowledge your feelings and address them, but also to think of all the positives - pregnancy buddy, two gorgeous babies in the family, cousins close in age who will (hopefully) be close growing up. Christmases will be amazing! My main advice though would be to focus on YOU, hormones make it tough but I'm in such a better place compared to where I was 2-3 months ago!