relationship proofs are: marriage certificate, marriage photos, pre-marriage and post marriage photos, engagement & reception photos, call or chat history, passport page & adhar card showing husband's name and address. joint bank account (if any) newspaper ad for adding husband's surname (if used). sponsor's travel details for as many times he/she visited the principal applicant in India ( passport pages with entry stamps or flight tickets). there can be more proofs depending on the case.
TRV refusal have no negative effects on PR application.
Hope this helps!