Advice on how to make a sauce for prawn and crab meat linguine!

[SpankyouHardOnChristmasNight]

I am thinking garlicky white winey?

I have:
lemons
craime fraiche
parsley
white wine
garlic
onions
king prawns
white crab meat
I just don't know how to put it together!!!

Sweat the onions/garlic gently, add the wine and lemon juice and reduce gently. Add the creme fraiche, parsley, prawns and crab meat - heating gently. I'm feeling very hungry now!

Oh yes, and plenty of seasoning (salt/pepper) - mouth watering

red chillis, surely?

oooh how much creme fraiche and lemon juice and wine??

Can i add capers too??

oh and I DO have red chillis too