Is it permissible to have marital relations during the day?
The Gmara writes that Jews are holy as they are not intimate with their wives during the day. We see that it is not the appropriate thing to do.
Under specific circumstances, there might be room to permit it, when the situation warrants it.
It would be best to speak to a Rabbi who is familiar with your situation if you feel this is necessary for you.
All the best
Rabbi Shay Tahan