So the wife just had a baby the other day and now i dont get to play as loud as i want to anymore

. When i practice i usually just crank up the computer with songs, and crank up my bass amp. I want to plug my guitar into the computer, practice the same way, but just wear headphones coming out of the headphone jack on the speakers hooked to the computer. Is this possible? I have been looking at the audio interfaces at guitar center. All they talk about is for recording. Will they do what im looking for? I just want to play live through the computer. no recording. Or is there a better way to do this? Any certain brand you guys recommend? Thanks