Having a roommate while ur married!

I had a friend to which needed a place to stay. She and her child moved in during the month February and were very great company. Until she started slacking in her house keeping skills. We just told her she has too move out. Me and my husbands relationship was taking a very unexpected and bumpy turn. We want a child but got our hopes up every single test. She was all for it. Anyway word of Advice do not let another person live with you while with someone else. Constant fights, and sleepless nights. Now that she's gone or in the process I think this baby may be on it way to being made ;) please prayers. Has anyone had any friendships end because of kicking them out for the better ?