Scared my sister will be sad

Hi! I feel kind of bad it’s weird. I have two sisters both older (34 and 30). I’m 25. My oldest sister has three kids. My second oldest sister is still single with no kids and I know this hurts her. I think she’s full of life but she is always down about her age and scared she won’t be able to have kids. I just told her we’re pregnant and she sounded happy for me in the phone but I think deep on the inside she may be sad or will get upset about her own situation. Idk. I’m just very empathetic and that makes me feel sad. I won’t to enjoy pregnancy and not feel like I’ll rub it in her face. I’m thinking maybe she could be the godmother?

😭