My July 2019 and 2021 babies

My toddler is a champ at bedtime. We have a routine and stick to it. But tonight she wasn't having it. 20 min after she had gone to bed, I hear her call for me to come sit next to her. I tried to see if she would doze off, but she didn't. So, I went in, and she asked me to sit w her. So of course I did. And she whimpered and asked me if "sissy coming tonight?" Cue the water fall from my face. I'm 38+2, and it was just too much for me. When did my tiny baby girl become a toddler? And how is she about to be "big" sister? I'm so excited for her to have a sibling. And she's seriously the best. I know it's going to be fine, but I just feel like I need to let go of this sadness surrounding her being my one and only.

These hormones yall!!!!