I don't think it'll burst out of his wife's chest, though.
Source
From the update:
As many of you know Mark (and wife) of Prodos Games is expecting a baby!
We were hoping to give this one out as a present when the baby came, but obviously some people are upset about the £185K Stretch Goal...so the present announcement comes early:
When baby comes and if we are above £170k everyone at 'Payback Time!' or higher will get an additional £10 of addons.
Add-ons are on Mark
Come on Baby! Make Mark pay......