My husband felt desperate to have marital relations this morning and we know that you are only allowed to do it at night. But he felt that it was going to come out any second and he would rather it be for a mitzvah then for nothing. What was the correct thing to do in this situation?
Yes, this was the correct thing to do. Marital relations by day are in fact permitted according to the letter of the law, as long as the room is completely darkened. While this practice is frowned upon as lacking in the proper kedusha and tznius fitting of this mitzvah, the intent is generally speaking. Exceptions may be made, and to save one’s self [or husband] from the sin of wasting seed, this would be permissible and preferable to the alternative.