Sorry for this being so long. I just need advice/comfort. Ok so my husband and I were planning on trying for a baby for a few months in June and July. My SIL overheard us talking to my Husbands dad about it in early July. When we left that night, his SIL had a weird grin on her face but I figured it was because of us talking about having another baby. So we conceive in July and find out we're pregnant and announce to our families in August. Well low and behold, my sister in law thinks she might be pregnant too. A few weeks later she messages me saying how "she really loves me" which is off because she never messages me and never tells me that as well. She then proceeds to tell me she's pregnant! And she hasn't even missed her period yet! She sent me a picture of her pregnancy test and everything. This is our second child and her fourth, after she claimed she wasn't having NO more kids after her third, whom she just have birth to a year ago. She can barely even take care of the three kids she has now That agitated me a bit because I believe she only started trying because she heard my husband and I talking about trying with my husband's dad. Even my other sister in laws feel the same way because she loves attention. So now my due date is April 16 and hers got moved up to April 24 since her baby is a bit big.

Here's the thing, we both have to have repeat csections. She's been telling everyone that whatever date I pick for my section, she's going to pick that date too! We're not even delivering at the same hospital! Our hospitals are like two hours apart. I don't want to share this date with her. I want my baby to have its own day. I feel so hurt and agitated about it. My MIL came to the hospital ONCE when my first was born which hurt my husband so badly. She didn't even want to hold baby except for like five seconds. So imagine if my SIL and me deliver on same day, my MIL would likely be with my SIL. I honestly don't even think she would bother to show up for us then with her "real" daughter giving birth as well. I'm just mainly agitated cause I want me to have my own day. I want my baby to have its own day and not have to share because it's aunt wanted all the attention.

What should I do? Am just overreacting?

Also, this isn't the first time my SIL stole the thunder from someone else. When she was prego with her third, my nice SIL was having her wedding a certain day, and my SIL calls my MIL and tells her life is in threat and so is the babies and to come to the hospital two hours away, on the day of my nice SIL's wedding! So her parents never even came to the wedding because of my SIL, who turns out lied about the whole thing and was only at hospital for Braxton hicks.