Harry knew it was expected of them and the marriage would not be complete with out it, but he was still unsure about this. He had known he was gay for some time but he had never been involved with a man before. And though he was married to Severus he had never really imagined the man would be his lover. He knew they only had to do it once, that his husband had agreed to be platonic in this marriage, but still it worried him. He refused to admit it to his husband but he was a virgin though he was not certain that Severus didn't know or guess that already. He reminded himself one night, one night and his husband would go to his own bedroom and they would be roommates until one of them died. And as scared as he would deny that he was he knew that it they did not do this that there would still be the issue if one died the other one would die and that would still become permanent in a year if they did not seal the marriage. He may have been worried about sex with his husband but he would rather face the fear then spend the rest of his life with the fear that he would suddenly drop dead because his husband had. He had gone through with the wedding to prevent that from happening, it would have been plain foolish for him not to take the final step as well.
Severus watched the confusion and fear dancing through his husband's eyes and he felt pity for Harry. He may have lived like a monk lately but he had not been celibate all of his life, and he was more then aware his young husband was a virgin. He knew he could have pointed out they could wait but it would put Harry in danger until they finished this. He would be as gentle as possible and try to make this as enjoyable as possible or his husband and if Harry never wanted him to touch him again, well they had already selected their rooms at Grimmauld and they could be simply roommates. Many arranged marriages were far from monogamous, Lucius' definitely was, and though he could not imagine doing it himself, he would not have begrudged his husband it.
Harry came into his arms finally and Severus apparated them away to his home. The little three bedroom cottage had been his Aunt's and now his, and had been the only home he ever really had. He hoped maybe he and Harry would come to spend some time here, but he would not change his mind on living at Grimmauld. He had seen how much Harry relief on his dad at the wedding and he knew part of Harry wanting to stay at Grimmauld was as much about him as his dad.
He led Harry for a tour of the rest of the house and leaned in to kiss him. "I know you're scared but I promise this will be as gentle and painless as I can make it."
Harry was flushing red as he realized Severus knew he was a virgin. "Thank you Sev."
He led Harry back to the sitting room where his elf had made some chocolate dipped strawberries and wine, not seeming to know how far from ready for romance they were but he could see that Harry was relieved for a reprieve from bed right away and he poured his husband a glass of wine for him. He remembered the first time he had been with someone, long before Harry was even born He had been a few years younger then Harry was though he could not even remember who it was.
Eventually he drew Harry towards the stairs and into his bedroom. He watched as Harry stood there nervously. "I promise I will not hurt you."
Harry remained still as Severus who was down to his own boxers helped him from his clothes except his own. Boxers. "I know."
Taking Harry into his arms and tilting his head up for a long warm kiss, he gently tugged on Harry's bottom lip until the lips parted and he could slide his tongue inside, delighting as he drew Harry's tongue into his own mouth and his husband tentatively explored. He led Harry back towards the bed and lowered him down against the pillows, his mouth leaving Harry's and moving away from his mouth, taking one of the fine earlobes into his mouth and eliciting a delighted moan from him. By the time he had moved down along Harry's neck to his chest he removed their boxers with his wand which he had reached for and his hand went to his husband's fine cock. He heard a surprised yelp as Harry felt his hand on the cock but it was placed soon with moans from the long gentle stroking of his cock, and Severus's mouth on his nipples. Harry's hips were lifting from the bed anxiously pressing against his hand and by the time he took the fine cock into his mouth Harry was near release and it only took a few stroked of his tongue to bring Harry the rest o the way.
He lowered his mouth down to his husband's and kissed him tenderly. "Are you ready?"
Harry was pale and shaking but he nodded and Severus casting a contraceptive spell gently started, giving his husband time to adjust for he was tight. It was slow going and Harry was tense but by the time he started moving in and out Harry was moving with him and came to his second climax at the same time. As he withdrew he lay down next to his husband after cleaning them both off.
He drew Harry into his arms. "Our marriage is complete. Tomorrow we will move to your home and we will be platonic s long as you wish us to be."
Harry actually snuggled into his arms and rested his head against his heart. "Our home Sev."
Kissing Harry as his husband drifted off Severus hoped it would not always be platonic for he was more then attracted to his husband and wanted more. He could not help but hope one day Harry would be willing to accept the honeymoon that Lucius had offered to plan and pay for.