What is your opinion on having more than one cat in the home?

I really want a second kitty to keep Mila company. My husband and I work work all day and she spends a lot of time alone.

Mila is a very social. She is with us all the time. When we get home at night she greets us at the door. She is always hanging around nearby and even sleeps with us.

My husband think that Mila become much less socialable if we get another cat.

What advice can you give me?