Ask expecting mom if she expects to continue working after baby?

[Fred Smith]

Hi all,

I have tenants expecting to break a lease who have lined up some friends to possibly move in. I'm leery but open to the idea, as it obviously eliminates a tenant search and possibly vacancy. The new tenants would be a couple expecting a baby and they originally expected a 3rd person as roomate but the 3rd person backed out. The income from the couple (which still needs to be verified) covers my minimum to cover rent but that includes the expectant mother's income, which I expect will stop once she has the baby and maybe before. Is anyone aware of legal issues around asking what their plans are for income once the baby is born? Seems like a straightforward question but I'm always cautious around these things. Thanks.