Jump to 4S? We have some pretty adequate defense, I'd be pretty happy to defend 4H, and we're probably going to catch a stiff spade and just go for a number! Bidding 4S really shows a lack of bridge understanding. Perhaps you should go back to playing with the novices.
Hmm, if west's hearts were really KQxxx or better, can't she just jump to grand? Counting 6 diamonds, SA, 4 hearts, CAK. edit: Oh poop never mind if they lead a club taking away the entry it's not very nice.