Yep, that's the mother busy delivering her live offspring for your viewing pleasure. You'd be wise to get rid of these promptly as those little ones will soon be delivering their own large batch of babies. Aphids multiply at a phenomenal rate.

That could be, although I seldom see Aphids on blossoms, on the stem just below the blossom yes but seldom on the blossom.
If you have them on the plants stems a sharp stream of water will knock them off the plant, although the offspring from those will show up in a few days.

Here is a link that might be useful: Aphids

Yes, they're aphids. And yes, they get on flowers.

the bad news is.... they are aphids.... the good news... they are one of the easiest pests to kill. sevin will do the trick, but do it quick or you will start seeing honeydew on the plant and eventually sooty mold which is rather unsightely.

Sevin is not only waaaay overkill, but also a chemical that should never be applied to flowers. It is terribly toxic to bees and other pollinating insects.