Mia is pregnant, but who is the father?

Mia is nervous, she has been waiting for this day for years but why did it have to happen now of all times? The doctor comes in with a smile on her face "Well Mrs Graves, I'm very pleased to announce that you are indeed pregnant. Congratulations." "Thank you Doctor, how many weeks?" Mia asks, trying not to look negative in case Doctor Davies suspects something. The doctor checks her chart, "Around 4 weeks but we'll need to perform an ultrasound to confirm, we can book you in for one next week?" "Yes, that's fine". Mia finishes listening to the doctor's medical advice before finally being able to grab her things and escape the Blue Moon Clinical Facility. She gets outside and walks calmly and casually to her car but her head is spinning and her emotions are in turmoil. She tries to calm herself down It's going to be fine Mia, just breathe. Of course it's not going to be fine! What the hell are you even thinking? Everything is just ruined, it's over! She sits in the car, giving herself five minutes to gather her thoughts and control her emotions before starting the car and driving towards the exit gate.