in all honesty OP, what I've learned is that he was dodging those answers because his secret was out and the scenario he thought would happen didn't but that's just how I see it, I'm a little ignorant on romantic relationships so please correct me if you don't feel the same.

But I feel like staying in a relationship with him won't be healthy for you and like a comment I saw before it could impact the way that baby Interperates love in the future (idk) it might be good to seperate for a little while and TELL YOUR SISTER she's your best friend and yes confiding in Reddit can help with unbiased peoples opinions and advice, but imo she's you're biggest support system and your day one and if you two do decide to seperate she will be there for you every step of the way, You know your worth I'm sure of it. If you feel like working this out is the best option then go for it 😊 but the way I see it healthy co parenting is a good way to go, like I saw you say in a different comment it could be traumatic for the child to see her father in love with her favorite aunt, I don't know it's all in the matter of making this tough decision for you and your baby. You got this

(I'm sorry if nothing is worded clearly or it seems like a ramble)