My friend is 39 and has 18 month old twins and split with her shit partner in early pregnancy. She kept the babies. She has an early teen as well from another shit partner. It was - is - very tough, but her parents have helped a lot (although they are in their late 60s, early 70s). My friend’s other child was delIghted not to be an only, and adores the twins (and also was smarter than the mother - always disliked the latest shit partner).
The father is a baddie, but the baby twins are a joy. I think my friend always wanted to have more children, so maybe that is why she never seriously considered a termination, despite the difficulty of her situation.
What I am saying is that if you want the babies, don’t let anyone convince you that your life will be miserable for 18 years. My friend still struggles (and I am guessing she is less affluent than you). The ongoing relationship through the babies with the ex shit is unpleasant, but the babies are a blessing and a joy that daily trumps all.
You have a choice, of course. But please don’t think that if you choose to keep the babies you will be miserable forever (or at least for years and years). I think my friend really wanted to be a mother again. If that’s what you also want, you can do it and though it will be hard, it won’t be awful, because you will have the babies that you chose and you will surely love.
The other choice will be just as good for you, but only if that is what you are sure you want: your career, financial independence, the freedom of an almost grown up child leaving home, and a decade of dating and enjoying still being almost young and getting to the peak of your career.
Beyond all that (which no one can really advise you on, because you have to go with your gut), under no circumstances agree to have a conversation where you are ganged up on by that shit guy and his wife. That may have been his nastiest suggestion yet.