What I'm concerned about is if the amount of UK pension (whether in own right or through spouse) would be considered WEP and result in less US social security benefit for me?
Only your entitlement to the UK SP would be considered. Your husband's would not be considered. It's up to you how you handle this, but just because you've not taken advantage of the grand £0.50, you are still entitled to it. Therefore, it should be considered for WEP when you apply.
Doing a down and dirty rough calculation, the amount of reduction would be (£0.50 x 1.50*** x 52 weeks: all divided by .5) for the yearly amount. This is $19.50 a year, or a $1.63 reduction a month in your US SS benefit.
*** the exchange rate will be the rate on the day the calculation is made. I've used 1.50 for convenience.
If a UK SP amount for you were to be credited based on your husbands NIC record, and the payments are made to you, then they would also be included for WEP calculations.
As Vadio says, only the US will use WEP. There is no such thing for the UK.