Hormones make rabbits unpredictable and dangerous to each other. I know you probably didn't know what you were getting into when you brought your female home, but putting them together, even for "playtime" if they aren't bonded is not fair. If you want to keep them together you should fix them both and they would make great companions-and be safe together. Also, before you consider breeding them just keep in mind the overabundance of rabbits that currently need homes, many of which are sitting in a shelter waiting for someone right as you read this. I understand this one pregnancy may have been accidental but you have the power and knowledge now to prevent future pregnancies.