I think Eirin is jealous that she got no one in her life and with her age being old af, she's essentially seeing all these kids getting married, having kids, and being happy. While she is old and alone, but still hot and probably never been on a date where she didn't ruin it with medical knowledge and scary shit.
That or she hates pregnancies/babys.
You're pregnant.Fufufufu...Who is...pregnant...?Congratulations.You of course? Use your head?ME!? REALLY!?Do you think I'm the type who would frivolously lie about that?If you're going to scream at someone, then raise hell with the man you slept with. It's grating for me.