Is it permissible for a husband to have intercourse with his two wives in one bed at their request?

We ask Allah to grant lasting affection between the questioner and her co-wife. There is a reward in bringing joy to the husband and for loving a Muslim. As for the husband having intercourse with them in one room, this is impermissible, even if they both consent, because it involves exposing private parts and violating the veil of modesty. It may also lead to inciting jealousy and discord.