Hi Dedra...
That is an excellent question to discuss I think...I was very lucky in the fact my husband wanted my mom with us when she got ill...But because of the very stressful situation of having a parent in your home, taking up most of your time, and just the total rescheduling of your life...I can see where problems could arise.
I guess my only advice to married couples taking in a parent to caregive for would be to make a rule right at the beginning. And that would be as soon as any resentment or anger rears, to sit down and talk honestly and openly about it.
To cut off lines of communication and keep everything bottled up we all know...leads to no good.
I use the word resentment because that is what I mostly can see happening. Resentment because your husband or wife can't do things like before with you, resentment because perhaps in the middle of a conversation they have to go take care of their parent, resentment in perhaps cutting an evening out short because their parent has a problem. It would probably begin to look to the other spouse as if they are coming second to the parent now.
I think if such thoughts manifest and cannot be worked through counselling would be my next advice, as caregiving can be so stressful and emotion wrenching that a third party may be necessary to put both in focus and on the right track again.
P.G.,,,