Why keeping it is not an option

Here's why keeping the baby is not an option.
Affair guy = Chandler
Husband = Joey

FYI: my husband and I were separated for awhile...but things are actually going great now, and that's why i wanted to give it a true fighting shot so that I can assess things without the bias lens of having another guy I deeply love, and decided to finally cut things off with Chandler, despite him that he says how much he loves me and i'm the love of his life/soulmate.

Option 1:
1. Don't say anything to Joey . Go 9 months not knowing, stressing, then after the baby is born do a paternity test (in secret of course). Which then:
a) The baby is Joey's. Phew. All is good for the rest of our lives.
b) The baby is Chandler's. Now I have to devastate Joey because he's already emotionally attached to the baby, have to go through a divorce with a newborn which is hard enough, and alienate myself from my support network that i WOULD need to survive a divorce, don't get me started on my uber religious parents, and I'd essentially be a single mom on one income in one of the top 10 most expensive places to live (no, moving not an option dont' ask) because Chandler's income is pretty much what I made in college (makes me an asshole, i know, and not that money matters when it comes to love and all that, but let's be real: babies cost money. period). That baby's gonna have a GREAT life.

2. Tell Joey that i'm pregnant and maybe it's not his. He leaves me, then I'm pregnant and going through a divorce. Definitely will be alienated and alone (don't give me this crap that if my friends really loved me they'd support me...there's very few people i'd support if they did this). Then:
a) It turns out it's Joey's. He lost out on 9 months of bonding, plus he'll never look athte baby with true love, yes i know him that well, because well straight up there was another dude's sperm in me at the same time as this baby.
b)It turns out to be Chandler's. Same option as 1b, above.

So with the exception of 1a, every option is crap. And HELL NO i'm not going to make him think Chandler's baby is his...that for SURE will bite me in the ass later...like if the kid needs a kidney in 18 years and THEN he finds out hte baby isn't his...he'd throw himself off a cliff in pain. And if I have someone's baby, then despite everything they should always know their real father.

Keeping this baby is not an option.