My boyfriend and I have been together on and off for 6 months,
a couple of months ago his ex girlfriend and mother of his son killed herself and their son, I was there to support him any way I could,
before this happened we decided to try for a family of our own.
We then split up after 2 months and went our separate ways.
After a month we realised how much we love each other and decided to give our relationship another go and we seemed to be getting on better than ever.

Then last week the girl he was seeing after we broke up, turned up at his house to say she was pregnant, they have had tests done and it has been confirmed she is now 13 weeks pregnant.

She has now said that if he does not leave me and go back to her, she will have an abortion.

I do not want him to have to make a decision like that and he shouldnt have to.
With everything he has had to go through the last couple of months I dont know what to do for the best, should I just say go, even though I know he does not love her,

i dont believe in abortions and neither does he.
But I do know that using this as a reason to get him back is hurtfull and wrong, how could any person use an unborn (or born) child as blackmail?

Is this illegal?