Extra sec. dep. when lease renews for new baby?

[Carolyn Keller]

Hi:

Pretty sure my excellent tenants have a new baby, in addition to their toddler.

Want to possibly ask for more of security deposit with this new baby as we all know kids and the damage they cause to rentals. 

Has anyone else done this? and do you put the names of the children on the lease as minors or just mention two children in a general way?

Thank you!