My older sister is pregnant again ..

She texted me saying she wanted to tell me something but then she said never mind you’ll tell. I don’t talk to anyone so I told her to just tell me. She proceeds to send me a picture of a positive pregnancy test . She already has two kids and is a single mother. She said plan b failed and it was a mistake. She knows I am very against abortions so why tell me then tell me she’s getting an abortion . I tried to talk her out of it but I think she’s going on with it . Kinda hurts me since I am 5 months pregnant and emotional. I just don’t know how to “help” her with any advice ... her excuse is “who’s gonna watch my baby when I have to work ? Knowing she has a good job for day care she just doesn’t want to pay for it .she wants someone to just watch her kid for free. Coming up with excuses for when she could’ve prevented it with being on birth control.. I just don’t get how selfish she can be.