Considering the situation they are in, baby is the last thing anyone should advise.
The couple clearly seem to be prioritizing their respective career/future over their marriage. Given their age, they are mature individuals who cant really be told to go down a certain route. so its going to be pointless for anyone to set them on the right path, specially when they are so adamant and selfishly following thier own individual needs.
It also seems they might already have drifted apart from each other emotionally. I have a feeling its a lost game. The distance might only increase their problems.