Oh, well there's always a chance that they will. With captive bred angels (most likely they are, unless you know they're wild-caught), the parenting skills have sort of been bred out of them by the selective breeding the species has gone through in order to produce the most sellable (is that a word? LOL) fish. See, they've had breeders choosing males and females they want to breed and rearing the fry themselves for so long that the traits which would have carried over in the wild, producing stronger and better parents, has sort of evolved out. So, in the even that they do lay eggs, you'll probably have to remove the fry and rear them yourself.
Tankmates aren't going to help the situation, and you may have a pair who can figure out what to do on their own, but that remains to be seen!