He didn't think a 'thank you' was a proper response, but he was glad that Jake told him. However, he was more interested in Dumbledore than confessions about sex lives or lack thereof.
Regulus looked worried when Jake sat down, looking angry and dejected. He prepared himself for betrayal, but what came out of Jake's mouth made him smile. They really were from different times.
"He's not the first to do such a thing, Jake. It's why I learnt Legilimency and Occlumency. Bella was my instructor and I assure that it wasn't easy." He walked closer and sat on Jake's leg. "It might be strange now, but ... I can't even say it was common before, but you assumed that it could happen at any time."
He kissed Jake's forehead. "Don't worry about it. You don't know anything that is going to get me in trouble, or didn't. What did he tell you, Jake? Please, this is very important. I need to know if he told you anything."