Who can claim spousal RRSP when deduction limit of high income spouse is reached?

I opened a Spousal RRSP and now find my contributions exceed my limit so I am not getting anything close to the 45% return. Since we share the same bank account and are in fact paying jointly can those contributions be claimed on  my spouses' return even though I am listed as contributor and her as beneficiary? When I enter it that way into Turbo tax it gives a larger refund. Thank you.