Fiancé had a kid on me...What do I️ do?

Hey guys I️ am scheduled to get married this Friday at my dream wedding. I️ am a stay at home with 2 beautiful 6year old twin boys Kyle and Ryan...yesterday I️ got a call from my soon to be husbands coworker Jenna telling me her n my fiancé have a baby together and wondered why she didn’t get an invite to our wedding. Mind you my fiancé never told me he had a kid.(my sons are not his) I️ asked how old her kid was and she said they have a 2 month old daughter name Sophie . My fiancé comes into the room right on cue. I️ hang up And ask babe who’s Jenna ? And why is she saying you have a kid with her? He’s like is that who you were on the phone with? I️ didn’t answer. And he said he donated his sperm to her because she asked and he needed the money to make my dream wedding come true. And I️ said so y’all had sex? And he says no they went to the bank and he provided me with the paperwork.

I️ don’t like they have a kid together before we had a kid together. Well I️ don’t like he has another kid period but I️ love him too much to call the wedding off...please I️ need advice . What do I️ do.

Update- he has shown me the paperwork and he said he moved locations at his job after she said I️t worked and she was pregnant. He told me he moved but he said his boss promoted him to another branch or something like that I️t was so long ago . He then admitted he was at her delivery but hasn’t been around nor has he bought her anything . He used every penny on the wedding. He didn’t want me stressing since we’ve been engaged for a year now. We’ve been together 4 Years .....Anyways I️ called her back well he did just now and put I️t on speaker I️ asked her side she said she’d been working with him for a while . She was married and her husband couldn’t have kids and she felt played because he didn’t tell her he couldn’t till after their wedding . They divorced and she was scared to hit menopause so she asked my fiancé and she offered to pay additional money if he went to the birth . She says my fiancé hasn’t paid for anything or visited or called since . So then I️ said if y’all had an agreement why did you call here? And she says she had a feeling I️ was in the dark and I said don’t call back here and hung up. I️ took my ring off and told my fiancé the weddings off and he put the ring back on my finger . We are about to talk

To clear that up .. I️ don’t like he has a kid period means I️ wouldn’t have liked if he had the kid with her AFTER we had a kid together. Since my previous sentence I️ said I️ dint like she had a kid with him before we had a kid . I’d be ok if the kid wasn’t while I️ was with him