Ugh Sonya is so annoying. She has some nerve! She basically forced Mark and Steph to go ahead with this surrogacy for her own closure, and in doing so she created friction between them leading to their inevitable break up (fair enough I never liked them as a couple, but it is still rude on Sonya's part). She then proceeds to blame them for leaving her carrying a baby that she thinks needs a stable upbringing, as if she could never have anticipated the obvious scepticism from Steph - it was so obvious! And now she wants to keep the baby, thus further burdening Toadie after she forced him to agree to the surrogacy too. She has no shame.
^ I know that was passionate, but she just gets on my nerves.