also having children can sometimes seem to the woman that they are the "safe guard" that you will stay with them forever and use that as an excuse to back off from keeping up on therapy. Also there will be lots and lots of days where you both will be just to tired to deal with stuff.. like her going to therapy or work.. or whatever because she is to tired. and you are to tired to push her to go. It can become an accepted thing sort of to get out of doing stuff for her.. she doesn't feel like it.. she was up with the baby for hours and you will understand knowing she was up. Also it could become worse like days she gets depressed or whatever from all the stress and its up to you to do everything.. take care of the baby and the house and work.. or whatever. Having a baby is very stressfull as well as exciting for any person... add that on top of a stresfull life and things could become to much but by then it would be to late.. the baby is already there. and as awfull as it is to think about.. it is never a 100% thing that the baby will be healthy and happy. even if it is just something like collic.. omg my oldest had that and I can tell you it's awfull till they outgrow it... when the baby crys in pain all night long.. ever night.. for about 6 months.. you need to be sure you can deal with it.
On the other hand.. sometimes having a baby brings out things in a woman that whern't there before.. the mothering instinct is strong. And if this is her "and you really can't tell till after the hormone's kick in full swing" it could be the kick in the rear so to speek to make herself get better to be the best mother she can be.