Fuck Yeah! Mortal Instruments

Ok I'm a little more than a teeny bit confused about how Charlotte got pregnant. She said Brother Enoch told her about it when he met her. But I thought they thought there wasn't any love in their marriage and Charlotte always hesitated to even touch Henry. The only time, I think, they may have done anything was when they got rid of the misunderstanding and kissed. But didn't Charlotte talk to Brother Enoch earlier in the book? UGH I'M SO CONFUSED >.<;