Had to have a d and e on 21st of dec. due to twins having no heartbeats. when is it ok to have intercourse?

Sex after a D and E: First off sorry for your loss. Normally its safe to have something in the vagina (includes sex)after something like that - in about 6 weeks - assuming any residual bleeding has stopped & any discharge doesn't have an odor and you don't have a fever. You might want to try positions that you can control the depth of penetration and stop if you start having pain.