Mammon's birthday, a special day for the avatar of Greed, it was also a day where he expected a lot more than usual, so his brothers, the angles, and Lord Diavolo went all out, getting him as many gifts as possible, of course Lucifer still humbled him when he got all pouty for 'not getting exactly what he wanted'

you, Mammon's lover, had been together for a long while now, he still acted like a tsundere around you though, and as time went by, you found that you were pregnant with his baby, you always wore baggy clothes though, and made excuses for your morning sickness, wanting to hopefully wait for the right moment, you recently went to the hospital to confirm your suspicions and returned with ultra sound pictures, hiding them until the right moment, today

when everybody had given him thier gifts, he went back to being pouty, his arms crossed, the brothers all snickered and rolled thier eyes, the angles made jokes while Lord Diavolo watched with intrest, entertained by the whole scene, while Barbatos stood next to him, a calm smile on his face, Mammon took notice of the nervous look on your face and spoke up

"Oi, Y/N! Why do you look so jumpy? What's behind your back there?"