You need to build her Affection back up. Have you brought back the puppies? Given her a replacement lock? Short of those veggies is pretty much the only (and slow) way to rebuild it.Yeah, she called the MC "a bastard" for impregnating her and said he should take responsibility. The garden got planted and yes, she got knocked up when she said the he should pull out.
I get that it could tank her affection drastically, but it's funny that her dialog doesn't change to reflect that.
TIP: Never come inside a girl who tells you not to. You will get to where she says it's okay, or even asks for it. Some girls take longer to get to that point.
My early interactions with Frida:
1st encounter - Compliment her house, get the pups back for free, give her veggies, ask if she's lonely & wish her luck, check the bedroom door to get the quest "Fix The Lock."
2nd encounter - Make the lock at the smithy, give it to her ("give gift"), ask if she's lonely & wish her luck.
3rd encounter - Give her veggies, ask if she's lonely & offer your "services." She should tell you to come inside her. Knocking her up right away is your choice.