Ah, ok. We use the expression "alimony" both for spousal and child support.
Yeah, well, again: That of course is wrong. If a couple here divorces and both work 100% nobody has to pay anything. OUr pension system tends to fuck women who took time off from work to care about children (or those who never worked because of children) up their ass, though.
Also, this puts way too much emphasis on the institution of marriage.
On the other hand, if there are children, child support doesn't end here when the child is 18, but when it has finished it's education. Makes sense to me.