A.C.
Two photo shoots for $300 and you keep the digitals? It is a pretty good deal for a professional photographer that can get the result you want. I've seen some pretty good stuff come out of "box" studios, but I believe it is the exception rather than the rule.
I regret not getting maternity photos...go for it. I think the key words are that she "would never spend that kind of money"...it isn't HER money, right?
If you have the money, it is yours to spend how you see fit. Photography is a skill which many hone for years. If their services weren't worth it, they'd have had to adjusted them years ago.