Even in the Pandemic, it was possible to get things from the Pharmacy including the morning after pill. Of course it is impossible to know what the circumstances of conception were. It could have been an accident where the father was happy for them to proceed but when they broke up, was less supportive.
However, on balance, I think the mother deserved a prison sentence but I do feel so badly for her children. It always seems that it is the children who come off worse and in this case none more so than the unborn child.
If drugs are going to be prescribed by telephone, I think it is really important that those needing the medication realise there are consequences to their dishonesty because it won't be long before anti-abortionists are seeking to have the service closed down.
Within all this, there is the terrible effect that all of this has had on this mother. Maybe prison isn't the best place for her (presuming that she isn't just being devious to get a lesser sentence) but somewhere she could get therapy along with a sound education on how to make sensible decisions so she doesn't get herself into this sort of mess. There was mention of "emotionally unstable personality traits" and although this would be quite difficult to change, it can be worked with CBT upon to help a person become more stable. I think this would be much preferable to prison and could even help her living children.