Family problems

Could it be that my family don't think that my hubby an our kids are good enough to go to the beach with my family? They always ask my brother an his wife an my ex sister in law to go but never ask us. When we have not ever done anything wrong to them my mom an dad love my kids but I don't think that they love them enough. Is this wrong of me think that my family don't want to spend anytime with me an my kids?