Depends on the situation. If you make the money, and the other person gets the kids, it's a given you'll owe child support but that's all fair but only applies to children under 18, in most cases.

When it comes to spousal support or alimony it tends to be kind of complex and I wouldn't assume you'll get screwed. Depends on the state and other factors. I can speak only to my state's rules but for spousal support there are a couple of good things today with the no-fault divorce. If the dependent spouse is living with a bf or gf, the spousal support will not be awarded. If spousal support is awarded it is usually for a limited time period, as if to say the dependent spouse is given time to become independent or find someone to support him/her. I believe in my case, she would aslo have to prove that she is incapable or unlikely to be able to support herself to get it.

It can be a bad thing but it's not necessarily going to be. Dont' assume, check your state's rules and contact an attorney for advice before jumping to conclusions.