She tells Britain's Sunday Mirror newspaper, "I'm enjoying procreating. I'm not missing smoking, drinking and going out. It's made me realize a lot about some people I used to hang out with. I still have to be around some of them when they're drunk and I'm like, 'Is that what we're like?' Being sober has opened my eyes a lot."
And Allen admits she's enjoying watching her body change as she steps closer to motherhood.
She says, "I'm actually really excited now I actually look pregnant. It's making it all the more real. My body's changing all the time and I've got to just embrace it. I'm growing all over. I've been wearing sexy maternity tights. I'm so glamorous it's unreal! The truth is I can't wait. Being a mother is something I've wanted for a very long time."