Hi British Bulldog
Receiving Carers Allowance and PIP is not a specific problem unless it directly contradicts the reasons someone is claiming PIP for in the first place.
If your wife does put in a claim and she has a face to face assessment she should be prepared to answer questions about the care she gives, especially in regard to areas that she has problems with in regard to her PIP claim, so that she can still provide the 35 hours of care a week that is required for her to receive Carers Allowance. (It is not a given that it is brought up, but it is always best to be prepared).
BIS
Nothing on this board constitutes legal advice - always consult a professional about specific problems