My MOH's boyfriend's family wants to come to the wedding

My sister is my MOH.

She has been in a relationship now for over 6 years and lives with him.

His sister and I use to be friends in high school but are now very distant.

My sister's boyfriend asked if they (his family) were being invited and my sister kind of caught off guard said yes.

My Mom believes I should invite his family as it would be difficult for my sister if we did not.

His other sister was very close to our family growing up but again has since moved on.

As my sister and her boyfriend will be marrying one day should I invite them out of respect for my sister.

It will be very awkward for her if I don't.

I am trying to keep the guest list at a comfortable number and now its growing. My parents are paying for the wedding.
What should I do?

I love my sister so much and don't want to upset her.

Answer by Diane:

Hello and thanks for writing in with your question.

If it is a question of space or if you really don't get along with these people and it would totally ruin your day if they were to attend your wedding, then I would say don't invite.

But it sounds like that is not the case, and your Mom has agreed that they should come and they are paying for the wedding.

So, if it is okay with your parents, I would extend the invitation and let them decide whether they would like to attend or not.

At least you extended the offer, which makes it easier for your sister in this awkward situation.

Wishing you all the best,

Diane