Please make sure you know what you are doing if you decide to bring the baby into the world against his wishes.
YES, it is your body, but no, it is not your choice alone.
By having a baby he doesn't want you are going to deprive that baby of his/her fathers love. You are making your husband responsible for a baby he doesn't want. You cannot say he will grow to love it, or he will fall in love as soon as it is born, because that may not happen!
Bonding WILL suffer, their relationship will suffer.
I was unwanted, by my mother. A termination wasn't an option, although she did try to cause herself to miscarriage several times. My father wanted me so much, that she was convinced to have me.
She couldn't hide the fact that she didn't love me. That she didn't want me. My parents broke up when I was 6, and I spent my childhood being rejected, treated very differently to my 3 siblings. Never feeling loved, or wanted. The only times I did was when I saw dad, which, because of my vindictive mother, wasn't often.
You have to think about all the possibles here. What if you do have the baby & your dh just can't accept your choice? What if he leaves & refuses to see dc3, but will happily have the other 2. What about child support, should he be made to pay for a baby he didn't want?
You have to stop thinking about what is best for either of you & think about the baby. Can you bestow a legacy of parental rejection on it?
Because even at 36, it still hurts like hell to be rejected by a parent.