Hmm. I don't really know what that's about, or whether it's friendly or unfriendly. She could be telling the other bird "pay attention to me" or "back off". If I had to guess I'd say that she's looking for romance, simply because it's spring and the older male is no longer available.
But in any case it seems like a mild message, and probably nothing to worry about. If you think her hormone levels could rise to the point where she might lay eggs, we have information on the main website about preventing that:
http://www.littlefeatheredbuddies.com/i ... mones.html The article was written for cockatiels but applies to parakeets too.