Is it likely my older sister doesn't love her husband?

They got married in 2019 and have twin boys. My sister is 37 and he's 45.
Base on these observations is it likely she doesn't really love him:
- He's not attractive and is overweight
- He's awkward in social gatherings, not the outgoing type
- Prior to meeting her, that guy has been dateless for like 12 years; not out of choice
- When they were dating, he agreed with waiting till marriage. Seems like he couldn't have sex any other way.
- On pictures and on videos (including their wedding) my sister has a forced, fake smile as if overdoing it.
- He gives off vibes of a desperate man that wanted to hold any woman showing interest in him
- He's also a marine biologist with a business
Is it likely my sister just grabbed him out of desperation (last resort?) and really doesn't love him?
Is it likely my older sister doesn't love her husband?
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