They repeatedly take prisoner back and forth; it seems prisoners don't really "taken to bed".
http://imgur.com/a/jxN99
This is my mod list.
<buildNumber>1135</buildNumber>
<activeMods>
<li>Core</li>
<li>MedievalShields-MedievalShields1.6</li>
<li>More Furniture</li>
<li>ExpandedProsthetics&OrganEngineering</li>
<li>HaulPriorityLiteNoUnforbid</li>
<li>Heated Paths</li>
<li>Hospitality</li>
<li>AllowTool</li>
<li>HydroponicRoom</li>
<li>kNumbers-0.4.1-A13</li>
<li>Mad Skills</li>
<li>PanzerMuffalo</li>
<li>RW_Blueprints-0.13.0.1</li>
<li>RW_FluffyRelations-0.13.0.1</li>
<li>RW_FollowMe--0.13.0.1</li>
<li>RW_Manager-0.13.0.2</li>
<li>RW_MedicalInfo-0.13.0.1</li>
<li>StorageSearch-1.0</li>
<li>VeinMiner</li>
<li>RW_EnhancedTabs-0.13.0.1</li>
<li>Stonecutting Tweak</li>
<li>EdBPrepareCarefully</li>
<li>Pawn State Icons</li>
<li>RW_PawnBar-0.13.0.1</li>
<li>ExtendedStorage-ExtendedStorage1.4</li>
<li>RepairBench</li>
<li>Horns&Tusks</li>
</activeMods>