He drinks. He had (as you say) really great beer, so he drank five of them (not an unrealistic number for a man relaxing at his house on a Saturday evening), and did you the consideration of waiting for you to go to bed, so you didn't have to watch him drink them.
Having a hard time seeing a problem with that part of it.
Now, if he's spending nondiscretionary income, that's a different issue altogether. But, if you are saving for a house you should set up an automatic transfer into a savings account (probably get a better return on a money market account, but I don't think you get the FDIC guarantee--not a huge issue, but full disclosure blah blah blah) so the money you want to save never even sees your checking account, let alone the inside of hubby's wallet.
Good luck
