It was nice to feel someone alive -- especially someone Ianto-shaped; River hadn't felt alive since his passing. Living through another's death did that to you.
She went quiet as they stepped inside the mansion, maids and housekeepers keeping well out of the way. They'd stopped dealing with River's...oddness...a long time ago, simply accepting it as a matter of fact.
Her fingers tangled in his tie and River sniffled, mumbling against him. "Iss warmer here."