I honestly don't see a problem with having a new member or a sister who is married and/or has children.
The time commitment for a marriage isn't too much different from the time commitment for any serious relationship (by which I mean engagement, living together/domestic partners, or headed for engagement). You still spend time with your SO, you may or may not live together, etc. Yet nobody's going to ask you to go alum for getting engaged... but put on a wedding band and it's out the door you go. If anything, being engaged is the point in a relationship requiring the greatest time commitment, because you're finalizing your decision to spend the rest of your life with this one individual, not to mention planning your wedding!
As for having a child, absolutely it is a priority in your life, but you don't have to be a mother to the exclusion of all else. I for one intend to have a career (if the market ever turns around
) and continue to be involved in my community no matter the age of my future child(ren). So, if a woman has time to be a mom and a sister, why shouldn't she be given the opportunity to do so? If rush is the big concern, have dad take the children on a dad-son or dad-daughter camping trip for a couple of weeks
ilovemyglo - I'm surprised the two-year-old was allowed into the rush parties. At my school only sisters and PNMs are allowed in the rush rooms unless there's an emergency, and two-year-olds, while havoc-wreaking, are not an emergency. If she'd pledged, would her sorority have let her child attend initiation too??
mozlvr - If your new member has lied outright about having a child - i.e. she definitely has a child and she has said outright "I do not have a child" - you could have a problem with her as a liar. But if it's just an omission - she never mentioned the child - and she is continuing to meet her obligations as a new member, I don't see the problem.