OK it's unlikely they're making whoopy unless you have actually seen them do it.....
Female birds can lay eggs regardless of whether they have sex or not. Tell me if I'm wrong but you're presuming they're mating because you see eggs? This is highly unlikely, though not completely 100% impossible as these things have happened in the past with other parrot species.
I'd bet they're not mating, even if they bond togther they will probably never mate & your tiel laying 7 eggs can be quite normal.
Please REMOVE the nest as you're promoting more egg laying & nesting behaviour. This is very unhealthy & draining to your as she'll spend too much time & energy sitting & laying. This isn't good for her health.
Leave the eggs for the ime being, never remove them. Allow her to go through the normal time for egg sitting & once she is bored with this & realizes her eggs won't hatch she'll abandon them. If you remove them now, this will encourage her to continue to lay & can be detremental to her health.
As for wanting the 2 to have babies. Be prepared to cop some flack for saying this as it is NOT good to have 2 species bred & many complications can & often do arrise from these situations. If you're looking forward to something like this happening....#1 sorry to burst the bubble but it aint gunna happen...#2 this is completely frowned apon & you will cop some serious s**t over this for wanting this to happen.
For future? Don't EVER allow this to happen again. And DO NOT attempt to hatch these eggs IF they're fertile.
EDIT: Just for the record, you can view the galahtiel here:
http://talkingbirds.com.au/worldfirst-galah.php
And these two birds are of a distant relation. They're BOTH cockatoo species. This is entirely different to a parrot (lovebird) & cockatoo (tiel) species breeding. You can't compair this to the galahtiel. In that website there is also a pair of otehr native parrots that're somewhat related & bred together.
My point is these parrots have a relation to each other in some way, lovebirds & cockatiels do not, nor do cockatoos of any kind & parrots of any kind.
humor4fms: the galahtiel was NOT purposely done so get off ya high horse! Nor were the birds in a caged. They were in a large avariy with other tiels, those 2 just happened to bond. THIS was an honest mistake that no one ever expected to happen.
Oh....you think it's fake? Well I suggest you not only look at the website I gave but you also get in touch with Lloyd Marshal (being an avian vet you should know who he is) don't know how? I'd be glad to tell you, just let me know if you wanna get this info.
Genetics can & have done the impossible, we all know this is true. And knowing about genetics, you should know this is not like comparing a bear & dog breeding. Now you can compare this to the lovebird & & the tiel, but not the galah & tiel.
You never cease to amze me with some of things you say. I'm really starting to think you need to go back to school.