Since your baby is 7 months, he will likely be able to hold his own bottle. This is not a "lazy mom" action, as it is good practice on his motor skills. You may enjoy having the eye contact with him if he takes his bottle in your lap. He can have a bottle in his high chair if you like and look around and take in the world a bit while he feeds.
He isn't a tiny infant so the sterilization of bottles may not even be recommended or necessary at 7 months.
And yes, family may enjoy sharing a feed but he will likely want to hold the bottle himself before long which is kind of cute.
Congrats on 7 months of breastfeeding. Happy feeding either way.