Yes, lots of members enjoy house and pet sitting as a couple. And the great news is they only need one membership! They simply share a sitter membership and select the option to travel as a couple when editing their profile.
If one of you already has a membership, you can just add the other person to the existing profile by editing your details. If not, one of you will need to create a membership for you to share — whoever sets this up will be the account holder and primary point of contact.